[!!!][+FEATURE] FLOW3 (Security): Added a HMAC generator and checker to prevent unauthorized access on objects where no edit fields were generated for. It is mandatory in case objects are modified on the server side. See the issue for a more in-depth explanation. This feature does NOT break backwards-compatibility as long as you use only Fluid for form-generation. In case of custom fields, it WILL break backwards compatibility, and you might need the @dontverifyrequesthash annotation. Resolves #4960.
[+FEATURE] Fluid (ViewHelpers): Added a request hash to all form fields. It is mandatory in case objects are modified on the server side. Relates to #4960.