Preserve README info of collectors

[Ancairon]

Description

due to the lack of issue template options on netdata/netdata, let's track this here.

as tasks come up they will be added here.

Tasks

Beta Give feedback

1. xenstat: @thiagoftsm debbugging section missing Update debug metadata netdata#15950
2. slabinfo: @thiagoftsm add the note about official native packages, probably in the prerequisites section as an item Update slabinfo metadata netdata#15951
3. tor: @MrZammler add the missing requirements to the prerequisites from the README Integrations: Add a note to enable the collectors netdata#15945
4. tomcat: @Ancairon fix a typo in the prerequisites Metadata fixes for some collectors netdata#15982
5. sensors: @andrewm4894 add the line about not working on your device (and needing to use the other sensors collector) as a troubleshooting step #1791
   +0
6. samba: @Ancairon should say that the plugin is disabled by default and how to enable it, probably in prerequisites section Metadata fixes for some collectors netdata#15982
7. nsd: @Ancairon add nsd version prerequisite Metadata fixes for some collectors netdata#15982
8. megacli: @tkatsoulas fix commands not in backticks and should say that the plugin is disabled by default and how to enable it, probably in prerequisites section Update collector metadata for python collectors netdata#16019
9. hpssa: @MrZammler should say that the plugin is disabled by default and how to enable it, probably in prerequisites section Integrations: Add a note to enable the collectors netdata#15945
10. hddtemp: @Ancairon check details in configuration options Metadata fixes for some collectors netdata#15982
11. go_expvar: @MrZammler should say that the plugin is disabled by default and how to enable it, probably in prerequisites section Integrations: Add a note to enable the collectors netdata#15945
12. fail2ban: @andrewm4894 populate the metadata with README info #1792
    +0
13. changefinder: @andrewm4894 populate the metadata with README info (original author of the collector I feel) #1793
    +0
14. adaptec_raid: @tkatsoulas make some code text into code blocks, state that the plugin is disabled by default and how to enable it (probably put it in prerequisites) Update collector metadata for python collectors netdata#16019
15. perf: @Ancairon prerequisites section about official rpm packages, fact that it is disabled by default, command keywords, debugging Metadata fixes for some collectors netdata#15982
16. nfaact: @thiagoftsm add debugging section and prerequisites
17. freeipmi: @thiagoftsm prerequisites need to be fixed Update descriptions. netdata#15952 @Ancairon to follow up, as some stuff is missing from the README still Preserve README info inside metadata.yaml for freeipmi.plugin netdata#15955
18. @sashwathn we talked about making https://github.com/netdata/netdata/blob/master/exporting/WALKTHROUGH.md a blog Creating Blogs for Content on learn which don't fit there blog#318
19. Asterisk and k6 need metadata.yaml files - @ilyam8
20. @sashwathn and if needed @Ancairon excess content from apps.plugin and the likes should go also in either system, application and container metrics pages, which will be present on Learn Creating Blogs for Content on learn which don't fit there blog#318
21. @ilyam8 update apps.plugin and cgroups.plugin metadata yamls
22. @thiagoftsm update tc plugin, Finally, create /etc/netdata/tc-qos-helper.conf with this content: tc_show="class" bit is missing, and probably should be inside the setup Improve description about tc.plugin netdata#16068