add upnp_nat_postrouting_chain .conf option

fixes #190

MINIUPNPD-PCP-PEER has also been renamed to MINIUPNPD-POSTROUTING
( 1ba4362910 )

miniupnpd/miniupnpd.c

@@ -1193,6 +1193,9 @@ init(int argc, char * * argv, struct runtime_vars * v)
 			case UPNPNATCHAIN:
 				miniupnpd_nat_chain = ary_options[i].value;
 				break;
+			case UPNPNATPOSTCHAIN:
+				miniupnpd_nat_postrouting_chain = ary_options[i].value;
+				break;
 #endif	/* USE_NETFILTER */
 			case UPNPNOTIFY_INTERVAL:
 				v->notify_interval = atoi(ary_options[i].value);

miniupnpd/miniupnpd.conf

@@ -47,6 +47,7 @@
 # default is MINIUPNPD for both
 #upnp_forward_chain=forwardUPnP
 #upnp_nat_chain=UPnP
+#upnp_nat_postrouting_chain=UPnP-Postrouting
 
 # Lease file location
 #lease_file=/var/log/upnp.leases

miniupnpd/options.c

@@ -61,6 +61,7 @@ static const struct {
 #ifdef USE_NETFILTER
 	{ UPNPFORWARDCHAIN, "upnp_forward_chain"},
 	{ UPNPNATCHAIN, "upnp_nat_chain"},
+	{ UPNPNATPOSTCHAIN, "upnp_nat_postrouting_chain"},
 #endif
 #ifdef ENABLE_NATPMP
 	{ UPNPENABLENATPMP, "enable_natpmp"},

miniupnpd/options.h

@@ -51,6 +51,7 @@ enum upnpconfigoptions {
 #ifdef USE_NETFILTER
 	UPNPFORWARDCHAIN,
 	UPNPNATCHAIN,
+	UPNPNATPOSTCHAIN,
 #endif
 #ifdef USE_PF
 	UPNPANCHOR,				/* anchor */