Spring cleaning of GDB's web pages

[Andrew Cagney <ac131313@cygnus.com>]

FYI,

I've zapped the following from the GDB web directory:

	contribute.html
	patch-db.html
	patch-checklist.html
	contents.html
	interfaces.html (merged into gdb/documentation)
	issues50.html
	lists.html
	copyright.html

Several others namely:

	assigning.html
	assignment-instructions.html
	assignment.txt
	fsf-forms/assign.changes
	fsf-forms/assign.changes.manual
	fsf-forms/assign.future
	fsf-forms/assign.manual
	fsf-forms/assign.program
	fsf-forms/assignment-instructions.html
	fsf-forms/conditions.text
	fsf-forms/copyrights.html
	fsf-forms/disclaim.changes
	fsf-forms/disclaim.changes.manual
	fsf-forms/disclaim.future
	fsf-forms/disclaim.manual
	fsf-forms/disclaim.program
	fsf-forms/gnu-head-sm.jpg
	fsf-forms/maintain_3.html-orig

I suspect can also go.  I think they all date back to the ``old'' way of 
handling assignments.  JimB?

	Andrew