Get DSOs working on Windows. Required cross platform change to mod_so.c.

Tim tested on Windows. Not tested on other platforms.

Submitted by:	Tim Costello
Reviewed by:	Bill Stoddard


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@84920 13f79535-47bb-0310-9956-ffa450edef68