[SpecGL] 1044 - Case of RFC2119 terms

Issue:1044 - Case of RFC2119 terms
        http://www.w3.org/Bugs/Public/show_bug.cgi?id=1044

"3.2 Requirement A: Use a consistent style for conformance
requirements and explain how to distinguish them." mentions that
RFC2119 terms are uppercase, but it should be noted that nothing in
RFC2119 (other than consistent usage as such) requires them to be used
in uppercase, despite specifications frequently explicitly mentioning
that they use lowercase variants instead.

Old Text:

[[[Using RFC 2119 [RFC2119] Keywords (MUST, SHOULD, MAY, ...) makes it 
easy to spot conformance requirements, due to their specific uppercase 
formatting; according to the RFC itself, they should be used only to 
establish interoperation [WIKI-RFC-KEYWORDS];]]]

New Text:

Using RFC 2119 [RFC2119] Keywords (MUST, SHOULD, MAY, ...) makes it 
easy to spot conformance requirements; according to the RFC itself, 
they should be used only to establish interoperation 
[WIKI-RFC-KEYWORDS]. They may be written with an uppercase formatting 
and/or a specific markup (See the Manual of Style).

-- 
Karl Dubost - http://www.w3.org/People/karl/
W3C Conformance Manager
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