Merge remote-tracking branch 'origin/master' into lua_config

* origin/master: (363 commits)
  TS-2564 Revert field token ordering.
  [TS-2664] atscppapi: Removing initializable value code
  [TS-2664] Removing initializable value code
  [TS-2664] Removing initializable value files
  TS-2660: rename StateMachineAction_t values with a consistent prefix
  [TS-2662] Re-enable KEEP_ALIVE_POST_OUT by default.
  [TS-2662] Re-enable KEEP_ALIVE_POST_OUT by default. This closes #66
  Fix harmless Ethread::schedule_in parameter mismatch
  TS-2661: Remove unused HttpSM::decide_cached_url method.
  Remaporder
  TS-2658: additional SSL certificate logging
  Cleanup the configure.ac in some sort of order... Minor.
  Update CHANGES with TS-2431
  TS-2431: Migrate Taobao SPDY plugin to ATS core
  TS-2431: Preparation of SPDY protocol
  TS-2431: Add autoconf options for SPDY
  [TS-2651] atscppapi: race conditions in destruction of async providers. This closes #64
  [TS-2651] atscppapi: race conditions in destruction of async providers
  [TS-2651] atscppapi: race conditions in destruction of async providers
  [TS-2651] atscppapi: race conditions in destruction of async providers
  ...

Conflicts:
	iocore/net/SSLUtils.cc
	proxy/Makefile.am