seckit 7.x-1.9-rc1

n.b. Please 'follow' #2200671: 7.x-1.9 release candidate to track any additional release candidates prior to the stable release.

This release addresses the following issues, and also adds a status report warning when report-only mode is enabled for CSP reports.

#2150731: Increase maxlength of the CSP fields so that more domains can be added
#2201887: Wrong HTTP_ORIGIN restriction for sub-folder base url
#2226521: Wrong comment tag
#2225523: Undefined index: CONTENT_TYPE / CONTENT_LENGTH in _seckit_csp_report()
#2200187: CSP report Content-Type has changed.
#2150905: Provide hook_seckit_options_alter()
#2210857: Support multiple hosts in X-FRAME-OPTIONS Allow-From mode