Run invoke-rc.d mysql maintscript snippets only when running under sysvinit (Closes: #864593)

debian/mariadb-server-10.1.postinst

@@ -167,4 +167,11 @@ fi
 
 #DEBHELPER#
 
+# Modified dh_installinit snippet to only run with sysvinit
+if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ]; then
+	if [ ! -e /run/systemd/system ] && [ -x "/etc/init.d/mysql" ]; then
+		invoke-rc.d mysql start || exit $?
+	fi
+fi
+
 exit 0

debian/mariadb-server-10.1.prerm

+#!/bin/sh
+set -e
+
+#DEBHELPER#
+
+# Modified dh_installinit snippet to only run with sysvinit
+if [ ! -e /run/systemd/system ] && [ -x "/etc/init.d/mysql" ]; then
+	invoke-rc.d mysql stop || exit $?
+fi
+
+exit 0

debian/rules

@@ -140,7 +140,7 @@ override_dh_systemd_enable:
 # Start mysql at sequence number 19 before 20 where apache, proftpd etc gets
 # started which might depend on a running database server.
 override_dh_installinit-arch:
-	dh_installinit --name=mysql -- defaults 19 21
+	dh_installinit --name=mysql --no-start -- defaults 19 21
 	dh_systemd_start --no-restart-after-upgrade
 
 override_dh_installcron-arch: