#6464 - autocomplete is not a boolean value anymore
#6464 - autocomplete supports non-boolean values (behaves like a text attribute)
Merge branch 'hotfix/#6464-allow-non-boolean-autocomplete-attribute-values' into develop

Close #6464
Refactor german (de) Zend_Validate.php

- Corrected placeholder token '%' for some translations
- Add new class names
- Replace '' with ""
Remove dublicated "eingegeben"
Fix typos
Fix typos
Replace "Eingabewert" with "Eingabe"
Replace "String" with "Zeichenkette"
Replace "String" with "Zeichenkette"
Replace "Integer" with "Ganzzahl"
Replace "Float" with "Gleitkommazahl"
Fix typo (wärend - während)
Merge branch 'feature/#6481-zend-validate-german-overhaul' into develop

Close #6481
[Http] Add body support for DELETE/OPTIONS request
#6492 - simplified HTTP method name checks, removed duplicate/redundant `elseif` statements
#6492 - using `in_array()` instead of large boolean expression
Merge branch 'hotfix/#6492-support-delete-post-request-body'

Close #6492
Merge branch 'hotfix/#6492-support-delete-post-request-body' into develop

Close #6492
Forward port #6492
#6386 Add Priority system for validators