License.rst: add Twig, PhpSpreadsheet

Nicola Chiapolini authored 5 years ago and Carsten Rose committed 5 years ago

  * Add Twig Extension to parse QFQ Links
  * Pass assoc-array of query result as context
  * allow to pass template as string

Fixes #8179 - extraButtonLock and extraButtonPassword might be specified without a value or with 0 or with 1.

Refs #8204. Copy requiredPosition from Form to FormElement has been moved from 'formElementSetDefault()' to 'copyAttributesToFormElements()'

F7529 - Guarantee Sip Action plays only once. Update Doc, change from set to '' to removing SIP Key/Value completely.

Replace pdftk by pdfunite. 'pdftk' is outdated. It's hard to install on Ubuntu 18. It fails for recent PDFs. 'pdfunite' is based on poppler. URLs are preserved. Orientation and size are preserved.

Release.rst: fix typo
Sitemap.rst: new created to be included by Index.rst.

Reformat Index.rst according https://github.com/TYPO3-Documentation/TYPO3CMS-Example-ExtensionManual.git