Clear all control.c flags on control_free_all()

Fixes bug 25512.

(Cherry-picked from 3519d0c808

src/or/control.c

@@ -7610,6 +7610,14 @@ control_free_all(void)
     tor_event_free(flush_queued_events_event);
     flush_queued_events_event = NULL;
   }
+  bootstrap_percent = BOOTSTRAP_STATUS_UNDEF;
+  notice_bootstrap_percent = 0;
+  bootstrap_problems = 0;
+  authentication_cookie_is_set = 0;
+  global_event_mask = 0;
+  disable_log_messages = 0;
+  memset(last_sent_bootstrap_message, 0, sizeof(last_sent_bootstrap_message));
+  flush_queued_event_pending = 0;
 }
 
 #ifdef TOR_UNIT_TESTS
@@ -7620,4 +7628,3 @@ control_testing_set_global_event_mask(uint64_t mask)
   global_event_mask = mask;
 }
 #endif /* defined(TOR_UNIT_TESTS) */
-