https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=225772

I had some doubts as for trivialness of this update, so creating this review.

freebsd_ports@k-worx.org takes maintainership

Vulnerabilities:

• CVE-2017-15953 and CVE-2017-15954: a heap-based buffer overflow.
• CVE-2017-15955: Access violation near NULL on destination operand and crash when processing a malformed CUE (.cue) file.

Additional port changes:

• Changed to DISTVERSION
• Added LICENSE/LICENSE_FILE
• Minor formatting change in do-build

VuXML will be committed first. Then the port.