mgmt: added manager to enable/disable control header features

refs: #1210

Change-Id: If4eb182c4baaba41be7c5f8e22e4f436eef1dac3
face: Face::setLocalControlHeaderFeature LLVM fix

workaround LLVM Bug 16816 on OS X 10.9

refs #1264

Change-Id: I364bfaf4ac4600bd031422dad36afd1377b87338