Don't hold the Apache screen open when it exits with an error if all of the error

messages are going to a file anyway.  In other words, don't hold the screen
open if the -E <filename> command line parameter is used.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@97507 13f79535-47bb-0310-9956-ffa450edef68