Enable sndio support in libao, based on the OpenBSD port. Also add --disable-alsa to CONFIGURE_ARGS because without it the port tries to link with libasound when it's installed. PR: 211662 Submitted by: Tobias Kortkamp <t@tobik.me>
head/audio/libao/Makefile
head/audio/libao/files/patch-src_plugins_sndio_ao__sndio.c
head/audio/libao/pkg-plist