[ACTION-69] Put the br element back into XHTML 2

I reintroduced BR - marking it as deprecated but leaving it part of the 
text module.  I consider this action closed.

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Shane P. McCarron                          Phone: +1 763 786-8160 x120
Managing Director                            Fax: +1 763 786-8180
ApTest Minnesota                            Inet: shane@aptest.com