MFH: r447554

• Bump Revision
• Fix typo in the Port's Makefile, causes a failure in a conversion script
• Added license file
• Cleanup Makefile

PR: 221144
Submitted by: <jaap@NLnetLabs.nl> (maintainer)
Reviewed by: matthew (mentor)
Approved by: matthew (mentor)
Differential Revision: https://reviews.freebsd.org/D11898

Approved by: ports-secteam (feld)