PORT: Add UnixWare 7 support

Submitted by: Vadim Kostoglodoff <vadim@olly.ru>
Reviewed and fixed (UW=7 -> UW=700) by: Ralf S. Engelschall
PR: 2463


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@81622 13f79535-47bb-0310-9956-ffa450edef68