Change the default port number to 6696.

IANA has changed Babel's allocation to 6696/UDP.

babeld.c

@@ -122,7 +122,7 @@ main(int argc, char **argv)
     srandom(seed);
 
     parse_address("ff02:0:0:0:0:0:1:6", protocol_group, NULL);
-    protocol_port = 6697;
+    protocol_port = 6696;
 
     while(1) {
         opt = getopt(argc, argv, "m:p:h:H:i:k:A:PsuS:d:g:lwt:T:c:C:DL:I:");

babeld.man

@@ -24,7 +24,7 @@ The default is
 .TP
 .BI \-p " port"
 Specify the UDP port number to be used by the protocol.  The default is
-.BR 6697 .
+.BR 6696 .
 .TP
 .BI \-S " state-file"
 Set the name of the file used for preserving long-term information