Colon characters are allowed in file paths, so if an image file named
'foo:bar.png' is passed as an --image argument, it's currently parsed as
image 'bar.png' on output 'foo'.
This fix allows the caller to pass the argument ':foo:bar.png' and treat
an output of '' the same as NULL. This is assuming there will never be
an output named '' however...
This implements a simpler version of the wlroots logger for swaylock.
With this logger, the dependency on wlroots can be dropped. This also
adds a debug flag and disables debugging output by default
This implements customization for the indicator as proposed in sway#2788 with comments from sway#3367 in mind.
The default behaviour does not change exept for the caps lock text color.
Since these changes seem to be lost in the split I've remade them.
