This eliminates some overhead, because the compiler doesn't need to
consider these functions throwing.

Prepare for a Decoder API redesign based on an abstract class with
virtual methods.

Merge lots of duplicate code.

Decouple some more from GLib.

functions to new dsdlib. Update user doc.

Don't call g_error(), which will abort the process and dump core.

Both options are deprecated, and should not be used anymore.  Many
users get confused by their presence.

On FreeBSD, "stderr" is a macro, and using this name for a struct
member breaks the build.

[mk: renamed _stderr to log_stderr]

Renamed type, variables and functions.

This updates the copyright header to all be the same, which is
pretty much an update of where to mail request for a copy of the GPL
and the years of the MPD project. This also puts all committers under
'The Music Player Project' umbrella. These entries should go
individually in the AUTHORS file, for consistancy.

Prepare for the migration to the GLib option parser, which uses
gboolean for flags.

"LOG_H" is a macro which is also used by ffmpeg/log.h.  This is
ffmpeg's fault, because short macros should be reserved for
applications, but since it's always a good idea to choose prefixed
macro names, even for applications, we are going to do that in MPD.