MDEV-34191: Make sure that Debian respects systemd disabled

Make sure that Debian respects systemd disabled by bumping
to deb compat 11 which is available from Debian 10 and Ubuntu 20.04
and it provides better integration with systemd.

Start using dh_installsystemd which is new recommended way
in compat 11

debian/compat

-9
+11

debian/rules

@@ -169,18 +169,12 @@ override_dh_auto_install:
 	mv -v $(TMP)/usr/lib/mysql/plugin/qa_auth_client.so $(TMP)/usr/lib/$(DEB_HOST_MULTIARCH)/libmariadb3/plugin/
 
 override_dh_installsystemd:
-	dh_systemd_enable --name=mariadb mariadb.service
-	dh_systemd_enable --no-enable --name=mariadb mariadb.socket
-	dh_systemd_enable --no-enable --name=mariadb-extra mariadb-extra.socket
-	dh_systemd_enable --no-enable --name=mariadb@ mariadb.socket
-	dh_systemd_enable --no-enable --name=mariadb-extra@ mariadb-extra.socket
-	dh_systemd_enable --no-enable --name=mariadb@ mariadb@.service
+	dh_installsystemd -pmariadb-server mariadb.service
 
 # Start MariaDB 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=mariadb -- defaults 19 21
-	dh_systemd_start --restart-after-upgrade
 
 # Use custom server version string variable
 override_dh_gencontrol:
@@ -191,6 +185,6 @@ override_dh_gencontrol:
 # white list file only starting from Debian Stretch and Ubuntu Xenial.
 # To find more, grep build logs for 'but is not installed to anywhere'.
 %:
-	dh $@ --parallel --with systemd --fail-missing
+	dh $@ --parallel --fail-missing
 
 # vim: ts=8