Remove self_update_interval.

This is a throw-back to the Babel 0 (!) protocol.  There's no longer any
reason to treat self-updates specially.

babel.c

@@ -543,7 +543,6 @@ main(int argc, char **argv)
                 continue;
             timeval_min(&tv, &net->flush_timeout);
             timeval_min(&tv, &net->hello_timeout);
-            timeval_min(&tv, &net->self_update_timeout);
             timeval_min(&tv, &net->update_timeout);
             timeval_min(&tv, &net->update_flush_timeout);
         }
@@ -693,8 +692,6 @@ main(int argc, char **argv)
                 send_hello(net);
             if(timeval_compare(&now, &net->update_timeout) >= 0)
                 send_update(net, 0, NULL, 0);
-            if(timeval_compare(&now, &net->self_update_timeout) >= 0)
-                send_self_update(net);
             if(timeval_compare(&now, &net->update_flush_timeout) >= 0)
                 flushupdates(net);
         }

message.c

@@ -1077,7 +1077,6 @@ send_self_update(struct network *net)
         for(i = 0; i < numxroutes; i++)
             send_update(net, 0, xroutes[i].prefix, xroutes[i].plen);
     }
-    delay_jitter(&net->self_update_timeout, net->self_update_interval);
 }
 
 void

network.c

@@ -115,9 +115,6 @@ update_hello_interval(struct network *net)
             rc = 1;
     }
 
-    net->self_update_interval =
-        MAX(update_interval / 2, net->hello_interval);
-
     return rc;
 }
 
@@ -323,7 +320,6 @@ network_up(struct network *net, int up)
             }
         }
         delay_jitter(&net->hello_timeout, net->hello_interval);
-        delay_jitter(&net->self_update_timeout, net->self_update_interval);
         delay_jitter(&net->update_timeout, update_interval);
         send_hello(net);
         send_request(net, NULL, 0);

network.h

@@ -53,7 +53,6 @@ struct network {
     unsigned short flags;
     unsigned short cost;
     struct timeval hello_timeout;
-    struct timeval self_update_timeout;
     struct timeval update_timeout;
     struct timeval flush_timeout;
     struct timeval update_flush_timeout;
@@ -79,7 +78,6 @@ struct network {
     time_t activity_time;
     unsigned short hello_seqno;
     unsigned short hello_interval;
-    unsigned short self_update_interval;
 };
 
 #define NET_CONF(_net, _field) \