cairo-spectrum, gl-spectrum: Convert to new-style plugin declarations.
bs2b: Migrate to new-style plugin declaration.
compressor: Migrate to new-style plugin declaration.
crossfade: Migrate to new-style plugin declaration.
echo_plugin: Convert to new-style plugin declaration.
crystalizer: Convert to new-style plugin declaration.
ladspa: Nominal conversion to PluginPreferences.
Add missing aud_plugin_instances.
ladspa: Convert to new-style plugin declaration.
Build plugins with -fvisibility=hidden.
mpg123: #undef EXPORT before mpg123.h also.
Convert remaining effect plugins.
oss4: Add minimal OSS3 support (to allow testing on an ALSA setup).
oss4: Implement period_wait() to fix high CPU usage.
oss4: Implement a live delay calculation.
oss4: Set buffer and fragment size.
oss4: Fix time showing as zero when paused.
oss: Fix build.
alsa: Port to new-style plugin declaration.
alsa: Keep forgetting this ...