errno should be set to the positive errno value.
This does not cause problems except for the pulse-server where the
errno value is negated and returned as an error result.
Make a registry of modules
Assign an unique number to each module with the MODULE_FLAG bit set
so that we can also enumerate them
Implement enumerating our internally loaded modules
Implement unloading of the module using the module id
Move module-null-sink into a separate file
Use Audio/Sink if no other media.class was given, so that it works
just like the pulseaudio module
Enable linger=true in all cases.
Parse the module arguments according to the pulseaudio syntax,
not our own syntax (which requires "" around a , delimter). Fixes
audio.position=FL,FR argument.
See #527
Implement a minimal version of the LOAD_MODULE and UNLOAD_MODULE
stream commands. The only supported module for now is the null
sink.
Modules are stored on a per-client bases, so that when clients
are disconnected, the modules they loaded is removed too.
This is enough to allow GNOME Network Displays to register a sink.
