Merge 2.6.8rc tags into 2.7.
diff --git a/.hgtags b/.hgtags
index d28b7b0..b8ce277 100644
--- a/.hgtags
+++ b/.hgtags
@@ -137,6 +137,8 @@
 c1dc9e7986a2a8e1070ec7bee748520febef382e v2.6.6rc1
 e189dc8fd66154ef46d9cd22584d56669b544ca3 v2.6.6rc2
 9f8771e0905277f8b3c2799113a062fda4164995 v2.6.6
+caab08cd2b3eb5a6f78479b2513b65d36c754f41 v2.6.8rc1
+1d1b7b9fad48bd0dc60dc8a06cca4459ef273127 v2.6.8rc2
 b4107eb00b4271fb73a9e1b736d4f23460950778 v2.7a1
 adc85ebc7271cc22e24e816782bb2b8d7fa3a6b3 v2.7a2
 4180557b7a9bb9dd5341a18af199f843f199e46e v2.7a3