[C2] xsp:request context patch

[Marcus Crafter <cr...@fztig938.bank.dresdner.net>]

Hi All,

	Hope all is well around the C2 globe!

	Attached is a patch that adds support for accessing the context path
	from the request object via the xsp-request markup stylesheet.

	eg:

	<information><xsp-request:get-context-path/></information>

	yields:

	<information>/context-path-to-webapp</information>

	It simply calls the getContextPath method on the Request object (via
	the XSPRequestHelper object).

	I'm using this functionality to build up src attributes for frames
	within some xsp so that they're not dependant on a fixed webapp
	context.

	eg:

	<xsp:element name="frame">
		<xsp:attribute name="src"><xsp-request:get-context-path/>/dir/file.html</xsp:attribute>
		<xsp:attribute name="name">_text</xsp:attribute>
	</xsp:element>

	Perhaps it's of use elsewhere too.

	Cheers,

	Marcus

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