No, really!  This fixes a regression of commit 74617389, which
changed the order of filter plugins.

GLib 2.16 was released more than 4 years ago.  Let's remove some cruft
from the glib_compat.h header, and avoid new cruft to it.

functions to new dsdlib. Update user doc.

Search and add search result to a stored playlist.

Conflicts:
	src/cmdline.c
	src/decoder/wildmidi_decoder_plugin.c
	src/gcc.h
	src/glib_compat.h
	src/input_stream.c
	src/output_list.c
	src/output_thread.c
	valgrind.suppressions

Dump all archive plugins, even those that fail to initialise.

Don't require the caller to provide them.