Add dnf5.conf man page

[inknos]

This PR adds the man page (5) for dnf5 options that can be used in dnf.conf.

• check options described in dnf4 that are not used in dnf5
  • document unused/deprecated options
  • add options in dnf5
• check dnf5 implemented options and decide how to document them
• decide on what to do with distribution specific options
• check english

Closes: #309

[inknos]

closes #309

[jan-kolarik]

I guess we can also add info about processing the configuration options priorities like MAINCONFIG, COMMANDLINE, RUNTIME etc.

[jan-kolarik]

Not in the scope of current PR, but what do you think about including similar information, as found in a man page, within the dnf5.conf template file? For example, similar to how the Apache Web Server provides commented-out lines with default values and descriptions...

[m-blaha]

@jan-kolarik On the other hand, having as many config options as dnf have can make the config file harder to read and maintain for the user.

[jan-kolarik]

@jan-kolarik On the other hand, having as many config options as dnf have can make the config file harder to read and maintain for the user.

Yep, it could be. I feel like having the descriptions and examples on a single place might be easier for a non-expert dnf user.

[j-mracek]

@inknos I see that PR is open for so log - May I ask you whether is it possible to finish the work, or split it?

[inknos]

I see that PR is open for so log - May I ask you whether is it possible to finish the work, or split it?

It is very difficult to provide a doc in one go. maybe split is the solution.

[m-blaha]

Thank you!