BUG/MINOR: threads: Remove the unexisting lock label "UPDATED_SERVERS_LOCK"

The update lock was removed by the commit 91c2826e1 ("CLEANUP: server: remove
the update list and the update lock"). But the lock label was not which makes
the compilation fail in debug mode.

pour vos modifications. Les lignes # commençant par '#' seront ignorées, et un
message vide abandonne la validation.  # # Sur la branche temp # Votre branche
est en avance sur 'origin/master' de 87 commits.  # (utilisez "git push" pour
publier vos commits locaux) # # Modifications qui seront validées : # modifié :
include/common/hathreads.h #
diff --git a/include/common/hathreads.h b/include/common/hathreads.h
index 794fa8b..b53cd77 100644
--- a/include/common/hathreads.h
+++ b/include/common/hathreads.h
@@ -468,7 +468,6 @@
 	case LISTENER_QUEUE_LOCK:  return "LISTENER_QUEUE";
 	case PROXY_LOCK:           return "PROXY";
 	case SERVER_LOCK:          return "SERVER";
-	case UPDATED_SERVERS_LOCK: return "UPDATED_SERVERS";
 	case LBPRM_LOCK:           return "LBPRM";
 	case SIGNALS_LOCK:         return "SIGNALS";
 	case STK_TABLE_LOCK:       return "STK_TABLE";