Move LICENSE, LICENSE_COMB and LICENSE_FILE up to appease new portlint. [1]
Use PORTDATA which allows simplifying pkg-plist significantly. [1][2]
Explicitly disable ALSA support. [2]
Add to PLIST_SUB instead of just setting it (for the OPENAL knob). [1]

Bump PORTREVISION due to the potentially fixed package list.

PR: 159749
Submitted by: Anatoly Borodin <anatoly.borodin@gmail.com> [1]
Inspired by: Anatoly Borodin <anatoly.borodin@gmail.com> [2]