Don't limit hello intervals to 65 seconds.

The protocol allows them to go up to 650 seconds, the value in msec
cannot be a short.

config.c

@@ -389,7 +389,7 @@ parse_nconf(gnc_t gnc, void *closure)
         } else if(strcmp(token, "hello-interval") == 0) {
             int interval;
             c = getint(c, &interval, gnc, closure);
-            if(c < -1 || interval <= 0 || interval > 0xFFFF)
+            if(c < -1 || interval <= 0 || interval > 10 * 0xFFFF)
                 goto error;
             nconf->hello_interval = interval;
         } else if(strcmp(token, "wired") == 0) {

network.h

@@ -30,7 +30,7 @@ struct buffered_update {
 struct network_conf {
     char *ifname;
     unsigned short cost;
-    unsigned short hello_interval;
+    unsigned hello_interval;
     char wired;
     char split_horizon;
     char lq;
@@ -77,7 +77,7 @@ struct network {
     unsigned int bucket;
     time_t activity_time;
     unsigned short hello_seqno;
-    unsigned short hello_interval;
+    unsigned hello_interval;
 };
 
 #define NET_CONF(_net, _field) \