Merge r1705217 from trunk:

core/util_script: relax alphanumeric filter of enviroment variable names
on Windows to allow '(' and ')' for passing PROGRAMFILES(X86) et.al.
unadulterated in 64 bit versions of Windows. PR 46751.

Submitted by: gsmith
Reviewed by: jailletc36, sf, ylavic



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1737360 13f79535-47bb-0310-9956-ffa450edef68