Auto merge of #4473 - wesleywiser:cyclical_features, r=matklad
authorbors <bors@rust-lang.org>
Sat, 9 Sep 2017 05:29:40 +0000 (05:29 +0000)
committerbors <bors@rust-lang.org>
Sat, 9 Sep 2017 05:29:40 +0000 (05:29 +0000)
Allow features to be cyclical

Fixes #3796


Trivial merge