include <stdlib.h> to ensure that the exit() prototype has been

seen before the exit macro is defined (fixes compile failure on
MinGW)

axe prototype for absent function set_listeners_noninheritable() 


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1090417 13f79535-47bb-0310-9956-ffa450edef68