Merge branch 'release/v1.7-RC6'

WHATSNEW.md

ajax.php

api/cron.php

api/http.php

api/pipe.php

assets/default/css/theme.css

include/ajax.config.php

include/ajax.tickets.php

include/api.cron.php

include/api.tickets.php

include/class.api.php

include/class.config.php

include/class.export.php

include/class.faq.php

include/class.file.php

include/class.format.php

include/class.mailer.php

include/class.mailfetch.php

include/class.mailparse.php

include/class.osticket.php