Merge r1753315, r1753316 from trunk:

configure: move away from obsolete AC_OUTPUT args

AC_OUTPUT's use with arguments was obsoleted back at or before autoconf
2.50. Replace it with the preferred AC_CONFIG_FILES/AC_CONFIG_COMMANDS
calls.

configure: remove orphaned APACHE_OUTPUT macro

The last use of APACHE_OUTPUT appears to have been removed back in
r87231.
Submitted by: jchampion
Reviewed/backported by: jim


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1762055 13f79535-47bb-0310-9956-ffa450edef68