change 14.21 Expires

Add the following paragraph to the end of 14.21:

	The presence of an Expires header on an response that otherwise would
by default
	be non-cacheable overrides the default and makes it cacheable.

This is for consistency with (old) section 13.7.1, and to make sure that
all the semantics of Expires are in one place.
Paul J. Leach            Email:
Microsoft                Phone: 1-206-882-8080
1 Microsoft Way          Fax:   1-206-936-7329
Redmond, WA 98052

Received on Friday, 7 June 1996 14:53:49 UTC