update Brazilian Portuguese translation

* manual/howto/htaccess.xml.pt-br: new file

Translated by: Eduardo Tompson Pereira <eduardo.tompson itelefonica.com.br>
Reviewed by: Luiz Rocha <lsdr lsdr.net>


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@157127 13f79535-47bb-0310-9956-ffa450edef68