the second piece of bug 969 fixing

whenever we remove a relay from the main routerlist, tell the
rephist module that it's no longer running.

src/or/dirserv.c

@@ -797,7 +797,7 @@ directory_remove_invalid(void)
     if (r & FP_REJECT) {
       log_info(LD_DIRSERV, "Router '%s' is now rejected: %s",
                ent->nickname, msg?msg:"");
-      routerlist_remove(rl, ent, 0);
+      routerlist_remove(rl, ent, 0, time(NULL));
       i--;
       changed = 1;
       continue;

src/or/or.h

@@ -4411,7 +4411,8 @@ void routerinfo_free(routerinfo_t *router);
 void extrainfo_free(extrainfo_t *extrainfo);
 void routerlist_free(routerlist_t *rl);
 void dump_routerlist_mem_usage(int severity);
-void routerlist_remove(routerlist_t *rl, routerinfo_t *ri, int make_old);
+void routerlist_remove(routerlist_t *rl, routerinfo_t *ri, int make_old,
+                       time_t now);
 void routerlist_free_all(void);
 void routerlist_reset_warnings(void);
 void router_set_status(const char *digest, int up);

src/or/routerlist.c

@@ -2629,7 +2629,7 @@ routerlist_insert_old(routerlist_t *rl, routerinfo_t *ri)
  * If <b>make_old</b> is true, instead of deleting the router, we try adding
  * it to rl-&gt;old_routers. */
 void
-routerlist_remove(routerlist_t *rl, routerinfo_t *ri, int make_old)
+routerlist_remove(routerlist_t *rl, routerinfo_t *ri, int make_old, time_t now)
 {
   routerinfo_t *ri_tmp;
   extrainfo_t *ei_tmp;
@@ -2637,6 +2637,9 @@ routerlist_remove(routerlist_t *rl, routerinfo_t *ri, int make_old)
   tor_assert(0 <= idx && idx < smartlist_len(rl->routers));
   tor_assert(smartlist_get(rl->routers, idx) == ri);
 
+  /* make sure the rephist module knows that it's not running */
+  rep_hist_note_router_unreachable(ri->cache_info.identity_digest, now);
+
   ri->cache_info.routerlist_index = -1;
   smartlist_del(rl->routers, idx);
   if (idx < smartlist_len(rl->routers)) {
@@ -3328,7 +3331,7 @@ routerlist_remove_old_routers(void)
         log_info(LD_DIR,
                  "Forgetting obsolete (too old) routerinfo for router '%s'",
                  router->nickname);
-        routerlist_remove(routerlist, router, 1);
+        routerlist_remove(routerlist, router, 1, now);
         i--;
       }
     }