net/mpd5: add a fix from upstream r2247

Prevent reporting wrong traffic accounting data in very rare case
of failure of netgraph statistical socket data flow.

net/mpd5/Makefile

@@ -3,7 +3,7 @@
 
 PORTNAME=	mpd
 DISTVERSION=	5.8
-PORTREVISION=	5
+PORTREVISION=	6
 CATEGORIES=	net
 MASTER_SITES=	SF/${PORTNAME}/Mpd5/Mpd-${PORTVERSION}
 PKGNAMESUFFIX=	5

net/mpd5/files/patch-fixstats

@@ -0,0 +1,30 @@
+Index: src/bund.c
+===================================================================
+--- src/bund.c	(revision 2246)
++++ src/bund.c	(revision 2247)
+@@ -1394,9 +1394,9 @@ BundUpdateStats(Bund b)
+     b->stats.runts	  += abs(stats.runts - b->oldStats.runts);
+     b->stats.dupFragments += abs(stats.dupFragments - b->oldStats.dupFragments);
+     b->stats.dropFragments += abs(stats.dropFragments - b->oldStats.dropFragments);
++    b->oldStats = stats;
+   }
+
+-  b->oldStats = stats;
+ #else
+     NgFuncGetStats64(b, l, &b->stats);
+ #endif
+Index: src/link.c
+===================================================================
+--- src/link.c	(revision 2246)
++++ src/link.c	(revision 2247)
+@@ -1359,9 +1359,9 @@ LinkUpdateStats(Link l)
+         l->stats.runts	  += abs(stats.runts - l->oldStats.runts);
+         l->stats.dupFragments += abs(stats.dupFragments - l->oldStats.dupFragments);
+         l->stats.dropFragments += abs(stats.dropFragments - l->oldStats.dropFragments);
++	l->oldStats = stats;
+     }
+
+-    l->oldStats = stats;
+ #else
+     NgFuncGetStats64(l->bund, l->bundleIndex, &l->stats);
+ #endif