apache2: add from OE-Classic, update to version 2.4.2 and fix

* Enable threading for PHP
* Backport a number of patches
* Use apachectl in init script
* Install modules into a sane location
* Ensure apxs script is installed into sysroot in crossscripts directory
  and modified so that it works for building PHP
* Install httpd executable for native version so that PHP configure
  script can call it
* Rename server-makefile-patch to server-makefile.patch and drop
  apply=yes
* Add LIC_FILES_CHKSUM
* Fix packaging QA warnings
* Add LSB headers to init script
* Clean out some cruft and move packaging stuff after do_install

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>