* Fix some comments in custom/conf/app.ini.sample
Some comments in app.ini.sample were very vague, didn't contain much information.
Some of them have been fixed, but mistakes that need to be fixed by an expert still remain, see #3928
Signed-off-by: Mikolaj Holysz <miki123211@gmail.com>
* Add an additional comment pointing to more documentation.
Add an additional comment to the top of the sample configuration file.
It contains a link pointing to gitea's docs and the configcheat sheet, which contains
some explanations about the parameters in the config.
Signed-off-by: Mikolaj Holysz <miki123211@gmail.com>