Tagging 2.6.6 final.
diff --git a/.hgtags b/.hgtags
index 26a97d6..962d9fe 100644
--- a/.hgtags
+++ b/.hgtags
@@ -94,3 +94,4 @@
 17d5b030e8779902d82f76ed32a69d8d5e71131a v2.6.6rc2
 0000000000000000000000000000000000000000 v2.6.6rc2
 e189dc8fd66154ef46d9cd22584d56669b544ca3 v2.6.6rc2
+9f8771e0905277f8b3c2799113a062fda4164995 v2.6.6