Survive unparseable cached cert file

ChangeLog

@@ -43,6 +43,7 @@ Changes in version 0.2.2.1-alpha - 2009-0?-??
     - If any the v3 certs we download are unparseable, we should actually
       notice the failure so we don't retry indefinitely. Bugfix on
       0.2.0.x; reported by "rotator".
+    - If the cached cert file is unparseable, warn but don't exit.
 
   o Deprecated and removed features:
     - The controller no longer accepts the old obsolete "addr-mappings/"

src/or/main.c

@@ -1410,8 +1410,10 @@ do_main_loop(void)
   /* initialize the bootstrap status events to know we're starting up */
   control_event_bootstrap(BOOTSTRAP_STATUS_STARTING, 0);
 
-  if (trusted_dirs_reload_certs())
-    return -1;
+  if (trusted_dirs_reload_certs()) {
+    log_warn(LD_DIR,
+             "Couldn't load all cached v3 certificates. Starting anyway.");
+  }
   if (router_reload_v2_networkstatus()) {
     return -1;
   }