- fix the installation path of the manual page
- re-introduce the -d, -u, -g, and -P options (background, username, group, PID file)
- apply the following patch as well:

diff --git a/mk/defaults/mk.conf b/mk/defaults/mk.conf
index 362970931a1d..a189ad0467f4 100644
--- a/mk/defaults/mk.conf
+++ b/mk/defaults/mk.conf
@@ -1049,6 +1049,16 @@ GAMEOWN?=	${GAMES_USER}
 # Possible:	any user name
 # Default:	${GAMES_USER}
 
+GERBERA_GROUP?= gerbera
+# System group to run the Gerbera Server as.
+# Possible: any group name
+# Default: gerbera
+
+GERBERA_USER?= gerbera
+# System user to run the Gerbera Server as.
+# Possible: any user name
+# Default: gerbera
+
 #GRUB_NETWORK_CARDS=
 # Compile netboot support for the listed network interface cards into GRUB.
 # Use e.g. "rtl8139" for RealTek 8139 support or "eepro100 epic100" for
