netmount: use want dependency to start nfsclient

add in parsing of fstab to determine if nfsclient should be automatically
started so that netmount can mount nfs without adding nfsclient
to the default runlevel

This fixes #71.

init.d/netmount.in

@@ -6,8 +6,16 @@ description="Mounts network shares according to /etc/fstab."
 
 depend()
 {
-	config /etc/fstab
+	local opts mywant=""
-	use afc-client amd nfsclient autofs openvpn
+	for opts in $(fstabinfo -o -t nfs,nfs4); do
+		case $opts in
+			noauto) ;;
+			*) mywant="$mywant nfsclient"; break ;;
+		esac
+	done
+ 	config /etc/fstab
+	want $mywant	
+	use afc-client amd openvpn
 	use dns
 	keyword -jail -prefix -systemd-nspawn -vserver -lxc
 }