Erratum: MAY NOT->MUST NOT

There are two instances of the phrase "MAY NOT" in the core spec (lines 
1050 and 1258).  This phrase is not actually defined by RFC 2199; I 
believe what was meant was "MUST NOT".  For this reason, and because 
"may not" is a classic ambiguous phrase in technical documentation 
("don't do this", as opposed to "you may or may not do this"), I 
recommend that we change it to "MUST NOT" in both locations.

I did not find any other occurrences of this uppercase phrase in the 
other documents.
	
	Eve
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Eve Maler                                        +1 781 442 3190
Sun Microsystems                            cell +1 781 354 9441
Web Technologies and Standards               eve.maler @ sun.com