The environment may be manipulated by modules such as mod_perl, so regenerate

the passed env argument on each CreateProcess call.

PR: 44800 (part 2/3)
Submitted by: tdonovan
Backports: r663699


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@663700 13f79535-47bb-0310-9956-ffa450edef68