[EBTABLES]: Add wildcard support for interface matching.

Due to an old braindead decision, ebtables doesn't yet support the
wildcard '+' for matching interface names. The following patch removes
this nuissance and is backwards compatible.
Signed-off-by: David S. Miller <davem@davemloft.net>

net/bridge/netfilter/ebtables.c

@@ -109,11 +109,17 @@ static inline int ebt_do_match (struct ebt_entry_match *m,
 
 static inline int ebt_dev_check(char *entry, const struct net_device *device)
 {
+	int i = 0;
+	char *devname = device->name;
+
 	if (*entry == '\0')
 		return 0;
 	if (!device)
 		return 1;
-	return !!strcmp(entry, device->name);
+	/* 1 is the wildcard token */
+	while (entry[i] != '\0' && entry[i] != 1 && entry[i] == devname[i])
+		i++;
+	return (devname[i] != entry[i] && entry[i] != 1);
 }
 
 #define FWINV2(bool,invflg) ((bool) ^ !!(e->invflags & invflg))