Merge r1795635 from trunk:

When processing a 'SetEnv' directive, warn if the environment variable name includes a '='. It is likely a configuration error.   PR 60249
Submitted by: jailletc36
Reviewed by: jailletc36, covener, ylavic


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1796853 13f79535-47bb-0310-9956-ffa450edef68