vimrc: disable -fdiagnostics-color output
Revert "build-sys: move journalctl CFLAGS= to one line"

This reverts commit e5d5aa1d0f4e143f12f5e00ca072547369d37e53; it
breaks if !HAVE_QRENCODE since then we aren't using $(AM_CFLAGS) for
journalctl.
build-sys: unify foo_CFLAGS = usage and add explaining comments

Always add the default AM_CFLAGS first.

If variables are used in conditionals, the default assignment
of AM variables is disabled, even when the conditional is not
in use; foo_CFLAGS = $(AM_CFLAGS) is needed, even when it looks
like a no-op.
log: avoid calling the logging functions for log levels above the current maximum

Messages with log levels above the current maximum log level will be dropped
inside log_meta(). But to be able to call the function, all parameters for
the function need to be provided. This can easily get expensive, if values
need to be calculated or functions are used in parameters.

Avoid all useless work by checking inside the macro, before we look
at any parameters passed to the logging functions.
log: Fix previous commit to use correct level
bus: allow to specify NULL as an empty string to add
bus: remove static introspection file export
bus: initialize variable, now that we might skip debug logging
socket-proxyd(1): fix references to non-existant files

socket.target -> sockets.target
/usr/bin/systemd-socket-proxyd -> /usr/lib/systemd/systemd-socket-proxyd
rules: remove pointless MODE= settings

Changing the default MODE= for the group accessi, but not specifying
a GROUP= does not provide anything.

It disables the default logic that the mode switches to 0660 as soon
as a GROUP= is specifed, which make custom rules uneccesarily complicated.

https://bugs.freedesktop.org/show_bug.cgi?id=70665
Experimental socket process pool.