Update mod_rewrite to v3.0.6:

------
  970615 - added a new ruleflag (QSA=query_string_append) and
           changed the behaviour when a QUERY_STRING is generated (xxx?...):
           In the past mod_rewrite always _appended_ the existing QUERY_STRING
           to the generated one which caused _a lot of confusing_ for the
users.
           Now the generated QUERY_STRING per default _REPLACES_ the
           existing one completely, except if the QSA flag is used.
           Now it acts the way the users always want to use it.

         - fixed a nasty bug in per-dir context:
           when a URL http://... was used in concunction with
           a special redirect flag, e.g. R=permanent, the
           permanent status was lost.
           [Thanks to Ronald Tschalaer <Ronald.Tschalaer@psi.ch> for hint]

         - added Q.08 and Q.09 to the FAQ/documentation
------

Reviewed by:	Alexei Kosut, Dean Gaudet, Marc Slemko
Submitted by:	Ralf S. Engelschall
Obtained from:


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@78336 13f79535-47bb-0310-9956-ffa450edef68