tag the 3.1.1 rc
diff --git a/.hgtags b/.hgtags
index 72992e5..1e32d0c 100644
--- a/.hgtags
+++ b/.hgtags
@@ -77,3 +77,4 @@
 a69a031ac1402dede8b1ef80096436bca6d371f3 v3.1
 f2a12f5259e7edd223c750e05ef56162d6a5345e v3.1.1rc1
 0000000000000000000000000000000000000000 v3.1.1rc1
+35efb1054ec6ceca72017a587263cb6a9257340b v3.1.1rc1