Wiki Link Updates (#4699)

##### Summary
<!--- Describe the change below, including rationale and design decisions -->
Replaces links to wiki pages with links to the respective markdown files in the repo. The files with the updates in this PR are not MD files. 

Fixes #4650 
<!--- HINT: Include "Fixes #nnn" if you are fixing an existing issue -->

##### Component Name
<!--- Write the short name of the module or plugin below -->

##### Additional Information
<!--- Include additional information to help people understand the change here -->
<!--- A step-by-step reproduction of the problem is helpful if there is no related issue -->

<!--- Paste log output below, e.g. before and after your change -->
```paste below

```

5 files changed, 27 insertions, 27 deletions

diff --git a/web/gui/dashboard_info.js b/web/gui/dashboard_info.js
index 278a72660d..2f542d436e 100644
--- a/web/gui/dashboard_info.js
+++ b/web/gui/dashboard_info.js
@@ -892,7 +892,7 @@ netdataDashboard.context = {
     },
 
     'apps.vmem': {
-        info: 'Virtual memory allocated by applications. Please check <a href="https://github.com/netdata/netdata/wiki/netdata-virtual-memory-size" target="_blank">this article</a> for more information.'
+        info: 'Virtual memory allocated by applications. Please check <a href="https://github.com/netdata/netdata/tree/master/daemon#virtual-memory" target="_blank">this article</a> for more information.'
     },
 
     'apps.preads': {
@@ -915,7 +915,7 @@ netdataDashboard.context = {
     },
 
     'users.vmem': {
-        info: 'Virtual memory allocated per user. Please check <a href="https://github.com/netdata/netdata/wiki/netdata-virtual-memory-size" target="_blank">this article</a> for more information.'
+        info: 'Virtual memory allocated per user. Please check <a href="https://github.com/netdata/netdata/tree/master/daemon#virtual-memory" target="_blank">this article</a> for more information.'
     },
 
     'users.preads': {
@@ -938,7 +938,7 @@ netdataDashboard.context = {
     },
 
     'groups.vmem': {
-        info: 'Virtual memory allocated per user group. Please check <a href="https://github.com/netdata/netdata/wiki/netdata-virtual-memory-size" target="_blank">this article</a> for more information.'
+        info: 'Virtual memory allocated per user group. Please check <a href="https://github.com/netdata/netdata/tree/master/daemon#virtual-memory" target="_blank">this article</a> for more information.'
     },
 
     'groups.preads': {
diff --git a/web/gui/demosites.html b/web/gui/demosites.html
index 5bb0000343..a5288d651f 100644
--- a/web/gui/demosites.html
+++ b/web/gui/demosites.html
@@ -680,7 +680,7 @@ p {
             with stunning, <strong>interactive</strong> web dashboards
             and powerful <strong>performance</strong> and <strong>health</strong> alarms.
         <div class=cta-option>
-            <a class="btn btn-download" href=https://github.com/netdata/netdata/wiki/Installation data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=Install><strong>Install netdata now</strong></a>
+            <a class="btn btn-download" href=https://github.com/netdata/netdata/tree/master/installer#installation data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=Install><strong>Install netdata now</strong></a>
             <a class=last-update href=https://github.com/netdata/netdata/releases data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=Releases>See netdata releases</a></div>
         <div class=cta-option>
             <a class="btn btn-alt" href="#demosites" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=Demo>netdata live demo</a>
@@ -694,55 +694,55 @@ p {
                 <p>
                     Analyze thousands of metrics per server.
                 <br/>
-                    Everything about <a href="https://github.com/netdata/netdata/wiki/Internal-Plugins" target="_blank" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=InternalPlugins>the system</a> (CPU,
-                        RAM, <a href="https://github.com/netdata/netdata/wiki/Monitoring-disks" target="_blank" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=MonitoringDisks>disks</a>,
-                    network, firewall, <a href="https://github.com/netdata/netdata/wiki/Why-netdata%3F#visualizes-qos" target="_blank" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=QoS>QoS</a>, NFS, ZFS, etc).
+                    Everything about <a href="https://github.com/netdata/netdata/tree/master/collectors" target="_blank" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=InternalPlugins>the system</a> (CPU,
+                        RAM, <a href="https://github.com/netdata/netdata/tree/master/collectors/proc.plugin#monitoring-disks" target="_blank" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=MonitoringDisks>disks</a>,
+                    network, firewall, <a href="https://github.com/netdata/netdata/tree/master/collectors/tc.plugin" target="_blank" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=QoS>QoS</a>, NFS, ZFS, etc).
                 <br/>
                     Detailed performance metrics for dozens of
                     <b><a href="https://github.com/netdata/netdata/blob/master/doc/Add-more-charts-to-netdata.md#add-more-charts-to-netdata" target="_blank" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=AddMoreCharts>applications</a></b>
                     (such as web servers, databases servers, email servers, DNS servers, etc).
                 <br/>
-                    Visualize metrics collected from <b><a href="https://github.com/netdata/netdata/blob/master/conf.d/node.d/snmp.conf.md" target="_blank" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=SNMP>SNMP devices</a></b>,
-                    and APM metrics via the embedded <b><a href="https://github.com/netdata/netdata/wiki/statsd" target="_blank" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=statsd>statsd server</a></b>.
+                    Visualize metrics collected from <b><a href="https://github.com/netdata/netdata/blob/master/collectors/node.d.plugin/snmp" target="_blank" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=SNMP>SNMP devices</a></b>,
+                    and APM metrics via the embedded <b><a href="https://github.com/netdata/netdata/tree/master/collectors/statsd.plugin" target="_blank" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=statsd>statsd server</a></b>.
             </div>
             <div class=grid-cell><h3><span class=star>&#x2605;</span> Out of the box</h3>
-                <p>netdata supports <a href="https://github.com/netdata/netdata/tree/master/collectors/python.d.plugin" target="_blank" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=AutoDetection>auto-detection</a> for everything. It collects more than 5000 metrics automatically, with
+                <p>netdata supports <a href="https://github.com/netdata/netdata/tree/master/doc/Why-Netdata.md#simplicity" target="_blank" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=AutoDetection>auto-detection</a> for everything. It collects more than 5000 metrics automatically, with
                     <strong>zero configuration</strong>, it has <strong>zero dependencies</strong>, requires <strong>zero
                         maintenance</strong> and comes with more than <a href="https://github.com/netdata/netdata/tree/master/health/health.d" target="_blank" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=AlarmConfigs>100 alarms</a> pre-configured to detect common
                     failures, performance and availability issues.
             </div>
             <div class=grid-cell><h3><span class=star>&#x2605;</span> In real-time</h3>
                 <p>netdata collects thousands of metrics per server <strong>per second</strong>,
-                    with <a href="https://github.com/netdata/netdata/wiki/Performance#netdata-daemon" target="_blank" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=Performance>just 1% CPU</a>
-                    utilization of a single core, <a href="https://github.com/netdata/netdata/wiki/Memory-Requirements" target="_blank" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=MemoryRequirements>a few MB of RAM</a>
+                    with <a href="https://github.com/netdata/netdata/blob/master/doc/Performance.md#netdata-performance" target="_blank" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=Performance>just 1% CPU</a>
+                    utilization of a single core, <a href="https://github.com/netdata/netdata/tree/master/database" target="_blank" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=MemoryRequirements>a few MB of RAM</a>
                     and no disk I/O at all.
                     View everything on <strong>stunning</strong> real-time interactive web dashboards, even when netdata is
                     running on low-end hardware.
             </div>
             <div class=grid-cell><h3><span class=star>&#x2605;</span> With alarms</h3>
-                <p><a href="https://github.com/netdata/netdata/wiki/health-monitoring" target="_blank" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=Alarms>Alarms</a>
+                <p><a href="https://github.com/netdata/netdata/tree/master/health" target="_blank" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=Alarms>Alarms</a>
                     can be set on any metric monitored by netdata.
-                    Alarm <a href="https://github.com/netdata/netdata/wiki/health-monitoring#alarm-actions" target="_blank" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=AlarmNotifications>notifications</a>
+                    Alarm <a href="https://github.com/netdata/netdata/tree/master/health" target="_blank" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=AlarmNotifications>notifications</a>
                     are role-based and support dynamic thresholds, hysteresis and can be dispatched via multiple methods
                     (such as email, slack.com, pushover.net, pushbullet.com, telegram.org, twilio.com).
             </div>
             <div class=grid-cell><h3><span class=star>&#x2605;</span> Embeddable</h3>
-                <p>netdata has minimal dependencies and can run <b><a href="https://github.com/netdata/netdata/wiki/netdata-for-IoT" target="_blank" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=IoT>even weak on IoT devices</a></b>. Also, its charts can be embedded on any web site.
+                <p>netdata has minimal dependencies and can run <b><a href="https://github.com/netdata/netdata/blob/master/doc/netdata-for-IoT.md#netdata-for-iot" target="_blank" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=IoT>even weak on IoT devices</a></b>. Also, its charts can be embedded on any web site.
             </div>
             <div class=grid-cell><h3><span class=star>&#x2605;</span> Customizable</h3>
-                <p><a href="https://github.com/netdata/netdata/wiki/Custom-Dashboards" target="_blank" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=CustomDashboards>Custom dashboards</a> can be built using simple HTML (no javascript necessary).
+                <p><a href="https://github.com/netdata/netdata/tree/master/web/gui/custom#custom-dashboards" target="_blank" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=CustomDashboards>Custom dashboards</a> can be built using simple HTML (no javascript necessary).
             </div>
             <div class=grid-cell><h3><span class=star>&#x2605;</span> Extensible</h3>
-                <p>Anything you can get a number for, can be given to netdata, using its <a href="https://github.com/netdata/netdata/wiki/External-Plugins" target="_blank" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=ExternalPlugins>Plugin API</a> (anything can be a netdata plugin, BASH, python, perl, node.js, java, Go, ruby, etc).
+                <p>Anything you can get a number for, can be given to netdata, using its <a href="https://github.com/netdata/netdata/tree/master/collectors/plugins.d" target="_blank" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=ExternalPlugins>Plugin API</a> (anything can be a netdata plugin, BASH, python, perl, node.js, java, Go, ruby, etc).
             </div>
             <div class=grid-cell><h3><span class=star>&#x2605;</span> Scalable</h3>
                 <p>
                     netdata scales out, your web browser is the central netdata
-                    <a href="https://github.com/netdata/netdata/wiki/mynetdata-menu-item" target="_blank" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=MyNetdataMenu>connecting all your servers</a>
+                    <a href="https://github.com/netdata/netdata/tree/master/registry" target="_blank" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=MyNetdataMenu>connecting all your servers</a>
                     together. But netdata can also
-                    <a href="https://github.com/netdata/netdata/wiki/Replication-Overview" target="_blank" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=Streaming>replicate its database</a>
+                    <a href="https://github.com/netdata/netdata/tree/master/streaming#metrics-streaming" target="_blank" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=Streaming>replicate its database</a>
                     to other netdata, and
-                    <a href="https://github.com/netdata/netdata/wiki/netdata-backends" target="_blank" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=Backends>archive its metrics</a>
+                    <a href="https://github.com/netdata/netdata/tree/master/backends" target="_blank" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=Backends>archive its metrics</a>
                     to <strong>graphite</strong>, <strong>opentsdb</strong>, <strong>influxdb</strong> or <strong>prometheus</strong> at a lower
                     rate, to avoid congesting these servers with the amount of data collected.
             </div>
@@ -1082,7 +1082,7 @@ p {
 <div class=site-section><h2>Who uses netdata?</h2>
     <div class="content">
         <div class="container" style="text-align: center;">
-            <small>Figures come from users using the <a href="https://github.com/netdata/netdata/wiki/mynetdata-menu-item" target="_blank" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=GlobalRegistry>netdata public global registry</a>.<br/>Counting since May 16th 2016. Actual figures may be a lot higher.<br/></small>
+            <small>Figures come from users using the <a href="https://github.com/netdata/netdata/tree/master/registry" target="_blank" data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=GlobalRegistry>netdata public global registry</a>.<br/>Counting since May 16th 2016. Actual figures may be a lot higher.<br/></small>
             <div class="container" style="padding-top: 40px; text-align: center; width: 30%; min-width: 220px; display: inline-block;">
                 <div class="mysparkline">
                     <div class="mysparkline-overchart-label">
@@ -1155,7 +1155,7 @@ p {
             <embed src="//registry.my-netdata.io/api/v1/badge.svg?chart=netdata.registry_entries&dimensions=persons&label=user%20base&units=null&value_color=blue&precision=0&refresh=30&v42" type="image/svg+xml" height="20" />
             <embed src="//registry.my-netdata.io/api/v1/badge.svg?chart=netdata.registry_entries&dimensions=machines&label=servers%20monitored&units=null&value_color=orange&precision=0&refresh=30&v42" type="image/svg+xml" height="20" />
             <embed src="//registry.my-netdata.io/api/v1/badge.svg?chart=netdata.registry_sessions&label=sessions%20served&units=null&value_color=yellowgreen&precision=0&refresh=30&v42" type="image/svg+xml" height="20" />
-            <br/><i>(figures come from <a href="https://github.com/netdata/netdata/wiki/mynetdata-menu-item" target="_blank">the public netdata registry</a> data, showing only installations that use this registry, counting since May 16th 2016)</i>
+            <br/><i>(figures come from <a href="https://github.com/netdata/netdata/tree/master/registry" target="_blank">the public netdata registry</a> data, showing only installations that use this registry, counting since May 16th 2016)</i>
             <br/>
         -->
             </p>
@@ -1180,7 +1180,7 @@ p {
             </div>
         </div>
         <div class=cta-option>
-            <a class="btn btn-download" href=https://github.com/netdata/netdata/wiki/Installation data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=InstallAfterDemo><strong>Install netdata now</strong></a>
+            <a class="btn btn-download" href=https://github.com/netdata/netdata/tree/master/installer#installation data-ga-category="Outbound links" data-ga-action="Nav click" data-ga-label=InstallAfterDemo><strong>Install netdata now</strong></a>
         </div>
     </div>
 </div>
diff --git a/web/gui/demosites2.html b/web/gui/demosites2.html
index 39520712fa..41ad9d6c65 100644
--- a/web/gui/demosites2.html
+++ b/web/gui/demosites2.html
@@ -597,7 +597,7 @@
         bandwidth consumption on the demo sites
     </div>
     <div class="mycontent">
-        Linux QoS is configured by <a href="https://github.com/netdata/netdata/wiki/You-should-install-QoS-on-all-your-servers">FireQOS</a>
+        Linux QoS is configured by <a href="https://github.com/netdata/netdata/tree/master/collectors/tc.plugin#tcplugin">FireQOS</a>
     </div>
 
     <!-- Nav tabs -->
@@ -719,7 +719,7 @@
         DDoS protection performance on the demo sites
     </div>
     <div class="mycontent">
-        iptables SYNPROXY configured by <a href="https://github.com/netdata/netdata/wiki/Monitoring-SYNPROXY">FireHOL</a>
+        iptables SYNPROXY configured by <a href="https://github.com/netdata/netdata/blob/master/collectors/proc.plugin/README.md#linux-anti-ddos">FireHOL</a>
     </div>
 
     <div style="padding-top: 4vw; width: 100%; text-align: center; font-size: 1.5vw;">
diff --git a/web/gui/index.html b/web/gui/index.html
index 86c95c9889..b0380da170 100644
--- a/web/gui/index.html
+++ b/web/gui/index.html
@@ -457,7 +457,7 @@
                     <div class="p">
                         <b><a href="https://github.com/netdata/netdata/wiki" target="_blank">netdata</a></b> is free,
                         open-source software. If you decide to use it,
-                        <strong><a href="https://github.com/netdata/netdata/wiki/a-github-star-is-important" target="_blank">it is important to give netdata a star at GitHub</a></strong>.
+                        <strong><a href="https://github.com/netdata/netdata/tree/master/doc/a-github-star-is-important.md" target="_blank">it is important to give netdata a star at GitHub</a></strong>.
                     </div>
                     <div class="p">
                         Enjoy real-time performance monitoring!
diff --git a/web/gui/main.js b/web/gui/main.js
index 64fb4805eb..ed318cefef 100644
--- a/web/gui/main.js
+++ b/web/gui/main.js
@@ -2801,7 +2801,7 @@ function notifyForUpdate(force) {
             save = true;
             var compare = 'https://github.com/netdata/netdata/compare/' + sha1.toString() + '...' + sha2.toString();
 
-            versionLog('<p><big><strong>New version of netdata available!</strong></big></p><p>Latest commit: <b><code>' + sha2.substring(0, 7).toString() + '</code></b></p><p><a href="' + compare + '" target="_blank">Click here for the changes log</a> since your installed version, and<br/><a href="https://github.com/netdata/netdata/wiki/Updating-Netdata" target="_blank">click here for directions on updating</a> your netdata installation.</p><p>We suggest to review the changes log for new features you may be interested, or important bug fixes you may need.<br/>Keeping your netdata updated, is generally a good idea.</p>');
+            versionLog('<p><big><strong>New version of netdata available!</strong></big></p><p>Latest commit: <b><code>' + sha2.substring(0, 7).toString() + '</code></b></p><p><a href="' + compare + '" target="_blank">Click here for the changes log</a> since your installed version, and<br/><a href="https://github.com/netdata/netdata/tree/master/installer/UPDATE.md" target="_blank">click here for directions on updating</a> your netdata installation.</p><p>We suggest to review the changes log for new features you may be interested, or important bug fixes you may need.<br/>Keeping your netdata updated, is generally a good idea.</p>');
 
             document.getElementById('update_badge').innerHTML = '!';
         }