Update to 7.6.23

• While I'm here, use WRKSRC for LICENSE_FILE

Changes: https://typo3.org/download/release-notes/whats-new/

		https://typo3.org/news/article/typo3-877-and-7623-released/

PR: 222468
Submitted by: Helmut Ritter <freebsd-ports@charlieroot.de> (maintainer)