classic-ui: config.cgi missing new option #6502

"disable_cmd_cgi_csrf_protection" has been added
to config.cgi and small type has been fixed.

refs: #6502
Merge branch 'fix/config-cgi-missing-new-option-6502' into support/1.11

fixes #6502
update Changelog

refs #6502
update docs
Revamp Changelog a bit
update config.{sub,guess}

fixes #6522
Release 1.11.5

Signed-off-by: Michael Friedrich <michael.friedrich@netways.de>