(Re-)tagging 2.6.6rc2.
diff --git a/.hgtags b/.hgtags
index 9116bcc..26a97d6 100644
--- a/.hgtags
+++ b/.hgtags
@@ -93,3 +93,4 @@
 c1dc9e7986a2a8e1070ec7bee748520febef382e v2.6.6rc1
 17d5b030e8779902d82f76ed32a69d8d5e71131a v2.6.6rc2
 0000000000000000000000000000000000000000 v2.6.6rc2
+e189dc8fd66154ef46d9cd22584d56669b544ca3 v2.6.6rc2