Summary: Update the spec and code to accept '+' as a charset name character
Reviewed-by: alanb

Summary: Moved non-confidiential test cased from closed repo to open repo
Reviewed-by: martin

Summary: Accept illegal URLs like file:c:/root/x.conf and file:this/that/x.conf
Reviewed-by: alanb, chegar

Reviewed-by: chegar, xuelei

Summary: Add regression test for redefining class with native methods.
Reviewed-by: sspitsyn