Update Brazilian Portuguese translation

* manual/new_features_2_0.xml.pt-br, manual/upgrading.xml.pt-br: fix typos etc.
* update transformation

Submitted by: Eduardo Tompson Pereira <duaspila ig.com.br>
Reviewed by: Luiz Rocha


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@154505 13f79535-47bb-0310-9956-ffa450edef68