Merge branch 'release/1.7-RC5'

include/class.ostsession.php

include/class.pagenate.php

include/class.passwd.php

include/class.pdf.php

include/class.priority.php

include/class.setup.php

include/class.sla.php

include/class.staff.php

include/class.team.php

include/class.template.php

include/class.thread.php

include/class.ticket.php

include/class.timezone.php

include/class.topic.php

include/class.upgrader.php

include/class.usersession.php

include/class.validator.php

include/class.variable.php

include/client/footer.inc.php

include/client/header.inc.php