mod-vhost-ldap-ng updated for apache httpd 2.4

Today I release the version 1.2.0 of mod-vhost-ldap-ng for the new Stable release of  Apache HTTPd.

+ Per-request document-root: solves some problem in memory management of apache structures and give more stability
+ Fixed some compiler warning
+ Better configure script, now you can point a custom apxs binary outside $PATH