Libnetdata readmes learn (#14416)

* Add remaining libnetdata readmes to learn

* Move all libnetdata readmes in learn under Developer/libnetdata libraries except for the main README

* Add the moved array allocator

22 files changed, 99 insertions, 10 deletions

diff --git a/libnetdata/README.md b/libnetdata/README.md
index fe0690d687..1424faf6ca 100644
--- a/libnetdata/README.md
+++ b/libnetdata/README.md
@@ -1,6 +1,10 @@
 <!--
 title: "libnetdata"
 custom_edit_url: https://github.com/netdata/netdata/edit/master/libnetdata/README.md
+sidebar_label: "libnetdata"
+learn_status: "Published"
+learn_topic_type: "Tasks"
+learn_rel_path: "Developers/libnetdata"
 -->
 
 # libnetdata
diff --git a/libnetdata/adaptive_resortable_list/README.md b/libnetdata/adaptive_resortable_list/README.md
index c47b28553d..957578487c 100644
--- a/libnetdata/adaptive_resortable_list/README.md
+++ b/libnetdata/adaptive_resortable_list/README.md
@@ -4,7 +4,7 @@ custom_edit_url: https://github.com/netdata/netdata/edit/master/libnetdata/adapt
 sidebar_label: "Adaptive Re-sortable List (ARL)"
 learn_status: "Published"
 learn_topic_type: "Tasks"
-learn_rel_path: "Developers"
+learn_rel_path: "Developers/libnetdata libraries"
 -->
 
 # Adaptive Re-sortable List (ARL)
diff --git a/libnetdata/aral/README.md b/libnetdata/aral/README.md
index 2b7376636e..3b0f5bbd62 100644
--- a/libnetdata/aral/README.md
+++ b/libnetdata/aral/README.md
@@ -1,6 +1,10 @@
 <!--
 title: "Array Allocator"
 custom_edit_url: https://github.com/netdata/netdata/edit/master/libnetdata/aral/README.md
+sidebar_label: "Array allocator"
+learn_status: "Published"
+learn_topic_type: "Tasks"
+learn_rel_path: "Developers/libnetdata libraries"
 -->
 
 # Array Allocator
diff --git a/libnetdata/avl/README.md b/libnetdata/avl/README.md
index 36392bd79f..2b03fec4af 100644
--- a/libnetdata/avl/README.md
+++ b/libnetdata/avl/README.md
@@ -1,6 +1,10 @@
 <!--
 title: "AVL"
 custom_edit_url: https://github.com/netdata/netdata/edit/master/libnetdata/avl/README.md
+sidebar_label: "AVL"
+learn_status: "Published"
+learn_topic_type: "Tasks"
+learn_rel_path: "Developers/libnetdata libraries"
 -->
 
 # AVL
diff --git a/libnetdata/buffer/README.md b/libnetdata/buffer/README.md
index 1d18c2c213..6a84fd8a31 100644
--- a/libnetdata/buffer/README.md
+++ b/libnetdata/buffer/README.md
@@ -4,7 +4,7 @@ custom_edit_url: https://github.com/netdata/netdata/edit/master/libnetdata/buffe
 sidebar_label: "BUFFER library"
 learn_status: "Published"
 learn_topic_type: "Tasks"
-learn_rel_path: "Developers"
+learn_rel_path: "Developers/libnetdata libraries"
 -->
 
 # BUFFER
diff --git a/libnetdata/circular_buffer/README.md b/libnetdata/circular_buffer/README.md
index 4482173d7f..23980dff39 100644
--- a/libnetdata/circular_buffer/README.md
+++ b/libnetdata/circular_buffer/README.md
@@ -1,6 +1,10 @@
 <!--
-title: "circular_buffer"
+title: "Circular Buffer"
 custom_edit_url: https://github.com/netdata/netdata/edit/master/libnetdata/circular_buffer/README.md
+sidebar_label: "Circular Buffer"
+learn_status: "Published"
+learn_topic_type: "Tasks"
+learn_rel_path: "Developers/libnetdata libraries"
 -->
 
 # Circular Buffer
diff --git a/libnetdata/config/README.md b/libnetdata/config/README.md
index 8069fdc9b4..c34cf9255a 100644
--- a/libnetdata/config/README.md
+++ b/libnetdata/config/README.md
@@ -4,7 +4,7 @@ custom_edit_url: https://github.com/netdata/netdata/edit/master/libnetdata/confi
 sidebar_label: "Netdata ini config files"
 learn_status: "Published"
 learn_topic_type: "Tasks"
-learn_rel_path: "Developers"
+learn_rel_path: "Developers/libnetdata libraries"
 -->
 
 # Netdata ini config files
diff --git a/libnetdata/dictionary/README.md b/libnetdata/dictionary/README.md
index cd38a6ca8d..508c4e0311 100644
--- a/libnetdata/dictionary/README.md
+++ b/libnetdata/dictionary/README.md
@@ -3,7 +3,7 @@ custom_edit_url: https://github.com/netdata/netdata/edit/master/libnetdata/dicti
 sidebar_label: "Dictionaries"
 learn_status: "Published"
 learn_topic_type: "Tasks"
-learn_rel_path: "Developers"
+learn_rel_path: "Developers/libnetdata libraries"
 -->
 
 # Dictionaries
diff --git a/libnetdata/ebpf/README.md b/libnetdata/ebpf/README.md
index 534867f317..c2dabe1027 100644
--- a/libnetdata/ebpf/README.md
+++ b/libnetdata/ebpf/README.md
@@ -1,5 +1,13 @@
 <!--
+title "eBPF"
 custom_edit_url: https://github.com/netdata/netdata/edit/master/libnetdata/ebpf/README.md
+sidebar_label: "eBPF"
+learn_status: "Published"
+learn_topic_type: "Tasks"
+learn_rel_path: "Developers/libnetdata libraries"
 -->
 
+# eBPF library
+
+Netdata's eBPF library supports the [eBPF collector](https://github.com/netdata/netdata/blob/master/collectors/ebpf.plugin/README.md).
 
diff --git a/libnetdata/json/README.md b/libnetdata/json/README.md
index 2e04b8b6bc..e772f114de 100644
--- a/libnetdata/json/README.md
+++ b/libnetdata/json/README.md
@@ -1,6 +1,10 @@
 <!--
 title: "json"
 custom_edit_url: https://github.com/netdata/netdata/edit/master/libnetdata/json/README.md
+sidebar_label: "json"
+learn_status: "Published"
+learn_topic_type: "Tasks"
+learn_rel_path: "Developers/libnetdata libraries"
 -->
 
 # json
diff --git a/libnetdata/july/README.md b/libnetdata/july/README.md
index 8f6e4d9be1..df2a3d38c2 100644
--- a/libnetdata/july/README.md
+++ b/libnetdata/july/README.md
@@ -3,7 +3,7 @@ custom_edit_url: https://github.com/netdata/netdata/edit/master/libnetdata/july/
 sidebar_label: "July interface"
 learn_status: "Published"
 learn_topic_type: "Tasks"
-learn_rel_path: "Developers"
+learn_rel_path: "Developers/libnetdata libraries"
 -->
 
 
diff --git a/libnetdata/locks/README.md b/libnetdata/locks/README.md
index 9132edc430..8810e3d175 100644
--- a/libnetdata/locks/README.md
+++ b/libnetdata/locks/README.md
@@ -1,5 +1,10 @@
 <!--
+title: "Locks"
 custom_edit_url: https://github.com/netdata/netdata/edit/master/libnetdata/locks/README.md
+sidebar_label: "Locks"
+learn_status: "Published"
+learn_topic_type: "Tasks"
+learn_rel_path: "Developers/libnetdata libraries"
 -->
 
 ## How to trace netdata locks
diff --git a/libnetdata/log/README.md b/libnetdata/log/README.md
index a767dd4465..5f9e5bc7b0 100644
--- a/libnetdata/log/README.md
+++ b/libnetdata/log/README.md
@@ -1,5 +1,15 @@
 <!--
+title "Log"
 custom_edit_url: https://github.com/netdata/netdata/edit/master/libnetdata/log/README.md
+sidebar_label: "Log"
+learn_status: "Published"
+learn_topic_type: "Tasks"
+learn_rel_path: "Developers/libnetdata libraries"
 -->
 
+# Log
+
+The netdata log library supports debug, info, error and fatal error logging. 
+By default we have an access log, an error log and a collectors log. 
+
 
diff --git a/libnetdata/onewayalloc/README.md b/libnetdata/onewayalloc/README.md
index 8374d19bab..3fa0d9fd31 100644
--- a/libnetdata/onewayalloc/README.md
+++ b/libnetdata/onewayalloc/README.md
@@ -1,10 +1,10 @@
 <!--
 title: "One Way Allocator"
 custom_edit_url: https://github.com/netdata/netdata/edit/master/libnetdata/onewayallocator/README.md
-sidebar_label: "One Way Allocator"
+sidebar_label: "One way allocator"
 learn_status: "Published"
 learn_topic_type: "Tasks"
-learn_rel_path: "Developers"
+learn_rel_path: "Developers/libnetdata libraries"
 -->
 
 # One Way Allocator
diff --git a/libnetdata/popen/README.md b/libnetdata/popen/README.md
index db4aefaedd..804690d13f 100644
--- a/libnetdata/popen/README.md
+++ b/libnetdata/popen/README.md
@@ -1,5 +1,15 @@
 <!--
+title: "popen"
 custom_edit_url: https://github.com/netdata/netdata/edit/master/libnetdata/popen/README.md
+sidebar_label: "popen"
+learn_status: "Published"
+learn_topic_type: "Tasks"
+learn_rel_path: "Developers/libnetdata libraries"
 -->
 
+# popen
+
+Process management library
+
+
 
diff --git a/libnetdata/procfile/README.md b/libnetdata/procfile/README.md
index 97861a9113..8610e77e52 100644
--- a/libnetdata/procfile/README.md
+++ b/libnetdata/procfile/README.md
@@ -1,6 +1,10 @@
 <!--
 title: "PROCFILE"
 custom_edit_url: https://github.com/netdata/netdata/edit/master/libnetdata/procfile/README.md
+sidebar_label: "Procfile"
+learn_status: "Published"
+learn_topic_type: "Tasks"
+learn_rel_path: "Developers/libnetdata libraries"
 -->
 
 # PROCFILE
diff --git a/libnetdata/simple_pattern/README.md b/libnetdata/simple_pattern/README.md
index dc119f2636..a0a7cf6888 100644
--- a/libnetdata/simple_pattern/README.md
+++ b/libnetdata/simple_pattern/README.md
@@ -5,7 +5,7 @@ custom_edit_url: https://github.com/netdata/netdata/edit/master/libnetdata/simpl
 sidebar_label: "Simple patterns"
 learn_status: "Published"
 learn_topic_type: "Tasks"
-learn_rel_path: "Developers"
+learn_rel_path: "Developers/libnetdata libraries"
 -->
 
 # Simple patterns
diff --git a/libnetdata/statistical/README.md b/libnetdata/statistical/README.md
index f254081d28..8fa101f0e3 100644
--- a/libnetdata/statistical/README.md
+++ b/libnetdata/statistical/README.md
@@ -1,5 +1,12 @@
 <!--
+title: "Statistical functions"
 custom_edit_url: https://github.com/netdata/netdata/edit/master/libnetdata/statistical/README.md
+sidebar_label: "Statistical functions"
+learn_status: "Published"
+learn_topic_type: "Tasks"
+learn_rel_path: "Developers/libnetdata libraries"
 -->
 
+# Statistical functions
 
+A library for easy and fast calculations of statistical measurements like average, median etc.
diff --git a/libnetdata/storage_number/README.md b/libnetdata/storage_number/README.md
index 4cd19a98bc..da2c3ccfd0 100644
--- a/libnetdata/storage_number/README.md
+++ b/libnetdata/storage_number/README.md
@@ -1,6 +1,10 @@
 <!--
 title: "Netdata storage number"
 custom_edit_url: https://github.com/netdata/netdata/edit/master/libnetdata/storage_number/README.md
+sidebar_label: "Storage number"
+learn_status: "Published"
+learn_topic_type: "Tasks"
+learn_rel_path: "Developers/libnetdata libraries"
 -->
 
 # Netdata storage number
diff --git a/libnetdata/string/README.md b/libnetdata/string/README.md
index e73ab2696c..b1c6e61c37 100644
--- a/libnetdata/string/README.md
+++ b/libnetdata/string/README.md
@@ -1,5 +1,10 @@
 <!--
+title: "String"
 custom_edit_url: https://github.com/netdata/netdata/edit/master/libnetdata/string/README.md
+sidebar_label: "String"
+learn_status: "Published"
+learn_topic_type: "Tasks"
+learn_rel_path: "Developers/libnetdata libraries"
 -->
 
 # STRING
@@ -17,4 +22,4 @@ index lookup to find it.
 
 Once there is a `STRING *`, the actual `const char *` can be accessed with `string2str()`.
 
-All STRING should be constant. Changing the contents of a `const char *` that has been acquired by `string2str()` should never happen. 
\ No newline at end of file
+All STRING should be constant. Changing the contents of a `const char *` that has been acquired by `string2str()` should never happen. 
diff --git a/libnetdata/threads/README.md b/libnetdata/threads/README.md
index 75ab11b1ea..71979feac4 100644
--- a/libnetdata/threads/README.md
+++ b/libnetdata/threads/README.md
@@ -1,5 +1,12 @@
 <!--
+title: Threads
 custom_edit_url: https://github.com/netdata/netdata/edit/master/libnetdata/threads/README.md
+sidebar_label: "Threads"
+learn_status: "Published"
+learn_topic_type: "Tasks"
+learn_rel_path: "Developers/libnetdata libraries"
 -->
 
+# Threads
 
+Netdata uses a custom threads library
diff --git a/libnetdata/url/README.md b/libnetdata/url/README.md
index bd289d955b..cca6f8731e 100644
--- a/libnetdata/url/README.md
+++ b/libnetdata/url/README.md
@@ -1,5 +1,14 @@
 <!--
+title: "URL"
 custom_edit_url: https://github.com/netdata/netdata/edit/master/libnetdata/url/README.md
+sidebar_label: "URL"
+learn_status: "Published"
+learn_topic_type: "Tasks"
+learn_rel_path: "Developers/libnetdata libraries"
 -->
 
+# URL
+
+The URL library contains common functions useful for URLs, like conversion from/to hex, 
+URL encode/decode and query string parsing.