Config improvements:
* More fine-grained Section mutators
* Add remap for mapping legacy single sections to key value pairs
* Add output stream operators for BasicConfig and Section
* Allow section values to be overwritten from command line
* Update rpc key/value configs from command line
* Add RPC::Setup with defaults and remap legacy rpc sections
Use secure RPC connections when configured
Remove obsolete SharedArg
Rewrite HTTP/S server to use coroutines:
* Fix bug with more than one complete request in a read buffer
* Use stackful coroutines for simplified control flow
* Door refactored to detect handshakes
* Remove dependency on MultiSocket
* Remove dependency on handshake detect logic framework