The http implementation - it may be hard to recognize the original connector code...

The http implementation - it may be hard to recognize the original connector code from tomcat after many iterations.
Changes compared with coyote:
- both server and client mode
- HttpRequest/HttpResponse implement most of methods in the HttpServletRequest - with the addition of setters, for use
in client mode. They don't implement the interfaces - or 'servlet framework' specific methods - but should look
familiar to people using this as a library
- mapping is moved in this package, also support running HttpServices in the selector thread (proxy will run this way)
- MimeHeaders are gone, so are the parameters - replaced with the MultiMap, which is based on MimeHeaders but adds a HashMap
instead of linear scanning
See tests for examples.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@884412 13f79535-47bb-0310-9956-ffa450edef68