Fix for bug #2005. Patch by Michael Glavassevich.

'scheme:#fragment' is not a valid URI, however from inspecting the code it
seems like Xerces-C will accept 'URIs' of this form. The ':' must be followed
by either a '/' or a uric_no_slash.


git-svn-id: https://svn.apache.org/repos/asf/xerces/c/trunk@175123 13f79535-47bb-0310-9956-ffa450edef68