Update config.yml.example for grammar

Logger

added optional argument so to override default repo location

propably better ssh-key id finding in ARGV

Add ca_file/ca_path configuration options.

Add message that repes_path should be real path

Regex used in rm-key command is too lax

Basically the issue is that 'gitlab-shell rm-key key-2' removes all keys that match "key-2" pattern.
"key-20", "key-25", etc.
This change makes the regex used in the sed command more strict.

In the main gitlab config there is a message that this should be the real path, meaning it looks like it can be the symlinked path in this config, experience shows this is not the case.

https can be served also on non-standard port