Include stdio.h to get prototypes for fgets() and fgetc()

(needed for pcfg_openfile()).
    Noted by bhyde@gensym.com (Ben Hyde)


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@79472 13f79535-47bb-0310-9956-ffa450edef68