Merged requested to merge clavelc/mkinitcpio:conf.d into master
ALL_configby default in preset files: use the default configuration file (e.g.
/etc/mkinitcpio.conf, and only use
ALL_configif it is specifically desired (i.e. not commented out in presets). I think this is a better default and should be kept whether or not we keep the rest of this MR.
Source additional configuration files, but only when using the default
/etc/mkinitcpio.conf(i.e., not when a configuration file is specified in a preset).