Revision 1830251

Correct various edge cases in the new HTTP Host header validation parser.
Patch provided by Katya Todorova.

Fix IPv6/IPv4 parsing for host header:
    - chars other than : should not be allowed in IPv6 address after ]
    - ::: should not present in IPv6 address
    - IPv4 part of IPv6 address was not correctly parsed (1 symbol of IPv4 part was ignored)
    - tests added to cover IPv4/6 parsing 
    - parsed test class fixed not to throw NPE when an exception is expected but not thrown