* Disallow adding CA's serial to revocation list
* Allow disabling revocation list generation. This returns an empty (but
signed) list, but does not affect tracking of revocations so turning it
back on will populate the list properly.
* Start work on passing context to backends
* More work on passing context
* Unindent logical system
* Unindent token store
* Unindent passthrough
* Unindent cubbyhole
* Fix tests
* use requestContext in rollback and expiration managers
* Add comments to every non-obvious (e.g. not basic read/write handler type) function
* Remove revoked/ endpoint, at least for now
* Add configurable CRL lifetime
* Cleanup
* Address some comments from code review
Commit contents (C)2015 Akamai Technologies, Inc. <opensource@akamai.com>
