Fix broken links (#4700)

##### Summary
<!--- Describe the change below, including rationale and design decisions -->
Fixes #4672 

The name of the branch is misleading, don't worry about it. Details on the fixes below.

##### Additional Information
> Checking links in ./doc/Netdata-Security-and-Disclosure-Information.md
>  1. [L13] 404 https://github.com/netdata/netdata/.github/ISSUE_TEMPLATE.md  

Fixed

> Checking links in ./REDISTRIBUTED.md
>  1. [L190] 404 https://github.com/netdata/netdata/blob/master/python.d/python_modules/urllib3/packages/six.py  

Fixed

> Checking links in ./web/api/queries/ses/README.md
>  1. [L53]  https://en.wikipedia.org/wiki/Moving_average#exponential-moving-average](https://en.wikipedia.org/wiki/Moving_average bad URI(is not URI?): https://en.wikipedia.org/wiki/Moving_average#exponential-moving-average](https://en.wikipedia.org/wiki/Moving_average 

False, link works

> Checking links in ./packaging/README.md
>  1. [L52] 404 https://github.com/firehol/infrastructure/raw/master/doc/release.txt  

Fixed 

> Checking links in ./installer/README.md
>  1. [L089] 404 https://github.com/netdata/netdata/blob/master/MAINTAINERS.md  

Fixed

>  2. [L241] 404 http://pkg.freebsd.org/FreeBSD:11:amd64/latest/All/netdata-1.10.0.txz  

Fixed 

> Checking links in ./daemon/README.md
>  1. [L080] 404 https://github.com/netdata/netdata/pull/403_ 

False. The URL is without the underscore
 
>  2. [L116] 404 https://github.com/netdata/netdata/blob/master/LICENSE.md  

Fixed 

> Checking links in ./collectors/python.d.plugin/web_log/README.md
>  1. [L026] 404 https://github.com/netdata/netdata/tree/master/conf.d/python.d 

Fixed 

> 2. [L030] 404 https://github.com/netdata/netdata/blob/master/conf.d/python.d/web_log.conf  

Fixed

>  3. [L187] 404 https://github.com/netdata/netdata/blob/master/conf.d/health.d/web_log.conf 

Fixed
 
>  4. [L200] 404 https://github.com/netdata/netdata/tree/master/conf.d/health.d  

Fixed

> Checking links in ./collectors/python.d.plugin/apache/README.md
>  1. [L52] 404 http://www.apache.org/server-status?auto  

Can't fix. Can't find a URL that will return server-status

> Checking links in ./collectors/freeipmi.plugin/README.md
>  1. [L090] 404 https://github.com/ktsaou/netdata/tree/master/plugins/freeipmi.plugin

Fixed (also in the c code)

> Checking links in ./CONTRIBUTORS.md
>   1. [L013]  http://producingoss.com/en/copyright-assignment.html Failed to open TCP connection to producingoss.com:80 (Connection refused - connect(2) for "producingoss.com" port 80) 

Fixed

1 files changed, 1 insertions, 1 deletions

diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
index fde3d0b4f6..46ae396f3a 100644
--- a/CONTRIBUTORS.md
+++ b/CONTRIBUTORS.md
@@ -10,7 +10,7 @@ This agreement is part of the legal framework of the open-source ecosystem
 that adds some red tape, but protects both the contributor and the project.
 
 To understand why this is needed, please read [a well-written chapter from
-Karl Fogel’s Producing Open Source Software on CLAs](http://producingoss.com/en/copyright-assignment.html).
+Karl Fogel’s Producing Open Source Software on CLAs](https://producingoss.com/en/copyright-assignment.html).
 
 By signing this agreement, you do not change your rights to use your own
 contributions for any other purpose.