first preliminary AZzbox ME support

TODO: some code is very similar to SPARK (record and pwrmngr
are just symlinked, dmx is almost identical). Reduce duplication
by factoring out DVBAPI code into an extra directory.
* what works: audio, video, demux
* what probably doesn't work or is untested: record
* what very likely doesn't work: playback
Playback is just copied over from aztrino and made to compile.
If you are lucky, it just segfaults :-)

azbox/init.cpp

@@ -0,0 +1,21 @@
+#include <unistd.h>
+#include "init_lib.h"
+#include "lt_debug.h"
+#define lt_debug(args...) _lt_debug(TRIPLE_DEBUG_INIT, NULL, args)
+#define lt_info(args...) _lt_info(TRIPLE_DEBUG_INIT, NULL, args)
+
+static bool initialized = false;
+
+void init_td_api()
+{
+	if (!initialized)
+		lt_debug_init();
+	lt_info("%s begin, initialized=%d, debug=0x%02x\n", __func__, (int)initialized, debuglevel);
+	initialized = true;
+}
+
+void shutdown_td_api()
+{
+	lt_info("%s, initialized = %d\n", __func__, (int)initialized);
+	initialized = false;
+}