OS/2: Rework CGI handling to use spawn*() instead of fork/exec, achieving

a roughly 5 fold speed up. Forking really sucks performance wise on OS/2
as it isn't supported by the kernal but fudged in the C libraries for
unix compatibility.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@83034 13f79535-47bb-0310-9956-ffa450edef68