Add support for the new "-manage-gids" option for the nfsuserd daemon

to the rc scripts. With these changes, setting nfs_server_managegids="YES"
in /etc/rc.conf will enable this capability.

Suggested by:	jpaetzel
Tested by:	jpaetzel
Reviewed by:	rc (pending)
MFC after:	2 weeks

etc/defaults/rc.conf

@@ -326,6 +326,7 @@ nfs_client_enable="NO"		# This host is an NFS client (or NO).
 nfs_access_cache="60"		# Client cache timeout in seconds
 nfs_server_enable="NO"		# This host is an NFS server (or NO).
 nfs_server_flags="-u -t"	# Flags to nfsd (if enabled).
+nfs_server_managegids="NO"	# The NFS server maps gids for AUTH_SYS (or NO).
 mountd_enable="NO"		# Run mountd (or NO).
 mountd_flags="-r"		# Flags to mountd (if NFS server enabled).
 weak_mountd_authentication="NO"	# Allow non-root mount requests to be served.

etc/rc.d/nfsd

@@ -32,9 +32,13 @@ nfsd_precmd()
 		sysctl vfs.nfsd.nfs_privport=0 > /dev/null
 	fi
 
+	if checkyesno nfsv4_server_enable || \
+	    checkyesno nfs_server_managegids; then
+		force_depend nfsuserd || err 1 "Cannot run nfsuserd"
+	fi
+
 	if checkyesno nfsv4_server_enable; then
 		sysctl vfs.nfsd.server_max_nfsvers=4 > /dev/null
-		force_depend nfsuserd || err 1 "Cannot run nfsuserd"
 	else
 		echo 'NFSv4 is disabled'
 		sysctl vfs.nfsd.server_max_nfsvers=3 > /dev/null

etc/rc.d/nfsuserd

@@ -15,5 +15,14 @@ command="/usr/sbin/${name}"
 sig_stop="USR1"
 
 load_rc_config $name
+start_precmd="nfsuserd_precmd"
+
+nfsuserd_precmd()
+{
+	if checkyesno nfs_server_managegids; then
+		rc_flags="-manage-gids ${nfsuserd_flags}"
+	fi
+	return 0
+}
 
 run_rc_command "$1"