Clean up indention and propogate the required notices for H.S.'s regex

Clean up indention and propogate the required notices for H.S.'s regex
and expat-lite to NOTICE.

Leaves me a question;  this is in httpd-1.3 LICENSE;

  For the expat xml parser library component:

  Copyright (c) 1998, 1999, 2000 Thai Open Source Software Center Ltd
                                 and Clark Cooper

Grepping the entire tree, I find no reference to Thai OSSC/C. Cooper,
does this even belong here?

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@110015 13f79535-47bb-0310-9956-ffa450edef68