- Merging branch lemonldap-ng-experimental/Handler-Mouse with with trunk
code impacted:
 * lemonldap-ng-handler/*: handler code,
 * lemonldap-ng-handler/example/*.pm: handler aliases to libraries,
 * _example/etc/*.conf: virtual host templates
(references #630, #LEMONLDAP-386)

Create a Common Session module to manage session like a Mouse object, using Common Apache::Session as backend (#671, #LEMONLDAP-673)