410405 Avoid NPE for requestDispatcher(../)
410405 Avoid NPE for requestDispatcher(../)

Added extra tests for dotdot and encoded dotdot.
Also protected against dotdot in absolute URIs
408806 getParameter returns null on Multipart request if called before request.getPart()/getParts()
fixed merge
Merge remote-tracking branch 'origin/jetty-8'

Conflicts:
	jetty-server/src/main/java/org/eclipse/jetty/server/AbstractHttpConnection.java
	jetty-server/src/main/java/org/eclipse/jetty/server/Request.java
	jetty-server/src/test/java/org/eclipse/jetty/server/HttpConnectionTest.java