Encapsulatte internal representation of HTTP protocol number with a

HTTP_VERSION(major,minor) macro. Currently, this is backward compatible
to the algorithm used now (1000*major+minor
Reviewed by:	Ken +1, Alexei +1, Jim +1


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@79429 13f79535-47bb-0310-9956-ffa450edef68