Changes to 'php'

[Christian Mollekopf]

New branch 'php' available with the following commits:
commit 87f7923531ab927606d860250e5554c72cb64505
Author: Christian Mollekopf <mollekopf at kolabsys.com>
Date:   Thu Jan 3 17:01:05 2013 +0100

    Patch by C. Giboudeaux
    
    - Replace the FindPHP4.cmake usage since we need PHP >= 5.3.
    - Fix the kolabformat installation. By default it now installs in the
    extensions directory defined when building php.
    This can be overwritten by manually setting PHP_INSTALL_DIR when running
    CMake.