The new method IsPlugin() replaces the "is_simple" flag.

Use a listener interface instead of GlobalEvents.

Build was broken by previous commit.

Fix build failure.

Fixes hanging child process in the "pipe" output plugin.

Link libvorbisfile first, followed to libvorbis and finally libogg.
This order is necessary because libvorbisfile depends on libvorbis.

Bionic doesn't have the SYS_* macros.

Use it if it exists, but don't insist if the C library is poor
(e.g. Bionic/Android).

Bionic's pthread declarations are non-literal.

Required for building without GLib.

Replaces g_str_has_suffix().

Temporary hack for the experimental no-GLib build.

Replaces g_strstrip().

This is misconfiguration, and MPD should abort.