Replace mod_browser with the more general mod_setenvif, but carry

	the BrowserMatch* directives forward for compatibility.

Obtained from:	Paul Sutton
Reviewed by:	Dean Gaudet, Randy Terbush, Ralf S Engelschall


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@78836 13f79535-47bb-0310-9956-ffa450edef68