Added tag v2.7.4rc1 for changeset a8d18780bc2b
diff --git a/.hgtags b/.hgtags
index 5681a12..86ec1e9 100644
--- a/.hgtags
+++ b/.hgtags
@@ -156,3 +156,4 @@
 b2c6aff96e1251a4f03cf866e7e75fb8232869f2 v2.7.3rc1
 d46c1973d3c407ecaa6a8ee16d3fad3ef506b51f v2.7.3rc2
 70274d53c1ddc60c5f9a2b8a422a49884021447c v2.7.3
+a8d18780bc2bccf16bf580587e1e3c934a98f6a7 v2.7.4rc1