For the fluidsynth plugin.

This fixes a regression: a boolean value was returned from
decoder_input_buffer(), but the caller chose to do a "<= 0"
comparison.

.. instead of manually checking pathname[0]=='/'.
g_path_is_absolute() is portable.

Don't attempt to fill the whole buffer in the read() method, return
whatever libbz2 provides with the first successful BZ2_bzDecompress().

Use the raw struct name.

This plugin is based on libzzip.

Conflicts:
	src/archive/bz2_plugin.c
	src/archive_api.h
	src/input/file_input_plugin.c
	test/run_input.c

Free the "context" pointer in the method archive_plugin.close().

Fixes a memory leak: the "archive" input plugin opens the archive, but
never closes it.  This patch moves the responsibility for doing that
to archive_plugin.open_stream().  This is an slight internal API
change, but it is the simplest and least intrusive fix for the memory
leak.

g_free(NULL) is allowed.

Fixed memory leak in error handler.

This enables valgrind debugging after an error occurred.

Enable archive plugin debugging.

This code has never made any sense, and has broken some of the archive
plugin.

This code has never made any sense, and has broken some of the archive
plugin.

Use struct forward declarations.

Don't use num_archive_plugins.

This fixes "make distcheck".

Removed local variable "sample_rate".

Not used by any plugin currently, but this eliminates the g_error()
call in input_plugin_config(), so it's worth it.

This is easier to traverse.

Wrap the AudioCompress library in a filter plugin.

Log to stderr, not to stdout (which broke PCM output).