Fix #4426
Fix #4413
fixes #4417; fixes servicegroup escalations
Merge branch '2.4.x' of http://git.centreon.com/centreon into 2.4.x
Fix #4431
Fix #4400
fixes #4452; htmlspecialchars() on insert/update
fix bug #4389
fix #4356
fix #4409
refs #4452; fix command listing
Merge branch '2.4.x' of http://git.centreon.com/centreon into 2.4.x
fixes #4468; + addslashes()
fixes #4467; +addslashes()
fixes #4466; + gettext()
fixes #4465; add help message
fixes #4464; set lang
fixes #4460; fixes filter issue
fixes #4364; htmlentities()
fix #4472