+ RC up

+ DietPi-Globals | Default RC up

+ CHANGELOG | Set release date, update release PR link and remove solved known RPi+VC4 sound card selection issue

+ DietPi-RAMdisk | Before storing DietPi to disk, remove status files that are recreated on boot/demand

+ DietPi-Update | .update_available flag file is now removed within DietPi-RAMdisk before storing to disk

+ DietPi-Patch | Remove flag/status files from disk once, which will be done from now on before DietPi-RAMdisk stores to disk

+ DietPi-PREP | Until rework (install requirements first, do autoremoval afterwards), resolvconf needs be installed prior to autoremoval to prevent ifupdown removal on some pre-images, e.g. Buster mini.iso

CHANGELOG | DietPi-PREP: Resolved an issue where ifupdown (networking service) was autoremoved, which broke running network connections

+ DietPi-Software | Revert from mariadb command to mysql command, since on Jessie mariadb command is not available and on Stretch + Buster it is a symlink to mysql anyway

- DietPi-Software | MPD: Resolved a systemd warning about invalid RuntimeDirectory value:
  - Jessie: [/lib/systemd/system/mpd.service:11] Runtime directory is not valid, ignoring assignment: /run/mpd
  - Stretch: [/lib/systemd/system/mpd.service:11] Runtime directory is not valid, ignoring assignment: /run/mpd
  - Buster: /lib/systemd/system/mpd.service:9: RuntimeDirectory= path is absolute, ignoring: /run/mpd
  - Path must be related, as it is always created beneath /run/: https://www.freedesktop.org/software/systemd/man/systemd.exec.html#RuntimeDirectory=
  - Setting it to "mpd" works well on Stretch and Buster, but on Jessie: Failed at step RUNTIME_DIRECTORY spawning /usr/bin/mpd: File exists
  - Neither the APT package systemd unit nor the upsteam one have the RuntimeDirectory defined. It defaults to /run/<service_name> and is successfully created and used if not defined. Removing the line works well on all three distro versions.

+ DietPi-Patch | Remove obsolete and wrong RuntimeDirectory definition: 882ddfb

+ DietPi-Cleaner | Tiny: Declare local i only once per function, a value does not need to be assigned, it is created as empty string by default, regardless of upper/non-local values

+ DietPi-Patch | Failsafe: Use Jessie-compatible service stop+disable, just in case of Jessie ARMbian systems

+ DietPi-Firstboot | Apply fixed locale support check: f8fc006
+ DietPi-Firstboot | Revert to 'en_GB.UTF-8' if chosen locale is not supported

+ DietPi-FirstBoot | locale -a shows en_GB.UTF-8 as "en_GB.utf8" for some reason