v1.2.12

Release v1.2.12

Core
 - Release v1.2.12
 - disable -ldl check for *BSDs, find <soundcard.h> path
 - Release v1.2.7.1
A52 Output plugin
 - a52 plugin: add support for FFMPEG 7.0
 - ESTRPIPE not defined, use ESPIPE (not EPIPE)
 - use EPIPE and EBADF when ESTRPIPE and EBADFD unsupported
Arcam AV control plugin
 - arcam_av.c: Include missing string.h
Jack PCM plugin
 - program_invocation_short_name: __linux__ -> _GNU_SOURCE
 - remove unused <byteswap.h>, use getprogname() for *BSDs
 - jack: use program_invocation_short_name
 - jack: implement pcm operation sw_params
OSS Mixer -> ALSA Control plugin
 - use <linux/soundcard.h>, <sys/soundcard.h> or
PulseAudio -> ALSA plugin
 - use EPIPE and EBADF when ESTRPIPE and EBADFD unsupported
Rate Converter plugins
 - samplerate: Make LGPL-only
USB stream plugin
 - remove unused <byteswap.h>, use getprogname() for *BSDs
libavcodec's resampler
 - a52 plugin: add support for FFMPEG 7.0

Signed-off-by: Jaroslav Kysela <perex@perex.cz>