[web/ajax] don't override any status code with 500 in ajax_error_handler If the request produced an error such as Unauthorized or NotFound, core_handle sets an appropriate status_out. Which is then overridden by the ajax error handler.

option_group_changed('port', 'main', 'web')
option_group_changed('query-log-file', 'main', 'web')
option_group_changed('profile', 'main', 'web')
option_group_changed('max-post-length', 'main', 'web')