zsh_completion: Allow specifying multiple arguments

Some of the options in systemd can take multiple arguments, such as
systemctl's --type option. Previously, you would only be able to
complete a single type after the -t, but now zsh will continue to
complete the types, separating them by commas.

systemd-inhibit's --what command has colon (:), and that has been taken
into account.
zsh_completion: machinectl properties can be stacked
zsh_completion: Remove ctls function from _systemd

The _ctls function in the main _systemd file is not needed.
hashmap: remove empty lines
hwdb: keyboard  - remove stray "

<dvdhrm> kay, hwdb/60-keyboard.hwdb line 147 it says KEYBOARD_KEY_ee=screenlock"
         with a " at the end. I guess that's a typo?
man: remove "wine" from unrelated man pages
sysctl: allow overwriting of values specified in "later" files