Merge pull request #2626 from pi-hole/hotfix/v4.2.2

Pi-hole Core v4.2.2

advanced/Templates/pihole-FTL.service

@@ -33,6 +33,8 @@ start() {
     mkdir -p /var/run/pihole
     mkdir -p /var/log/pihole
     chown pihole:pihole /var/run/pihole /var/log/pihole
+    # Remove possible leftovers from previous pihole-FTL processes
+    rm -f /dev/shm/FTL-* 2> /dev/null
     rm /var/run/pihole/FTL.sock 2> /dev/null
     # Ensure that permissions are set so that pihole-FTL can edit all necessary files
     chown pihole:pihole /run/pihole-FTL.pid /run/pihole-FTL.port