• Update `audio/aubio' to version 0.4.1; make all dependencies/features optional; provide a way to disable Doxygen even when it was found in the system
• License was changed to GPLv3; do not install LICENSE_FILE since it is merely a boilerplate with no actual copyright data
• `audio/ardour' needs to be patched for API changes in aubio 0.4. The patch comes from upstream, but new aubio version detection logic is not directly applicable, so simply define HAVE_AUBIO4 in the port's Makefile
• While here, ensure that audio/ardour' gets all of its dependencies, (ir)regardless of particular OPTIONS selected (or not selected) for the audio/aubio' port
• Bump port revisions of audio/ardour' and audio/denemo', the only two libaubio consumers in the tree

PR: 200556 (slightly modified)