should appear smoother

Fixes playback with single file, simple profile

There is no actual usage of the waitpipe left in the HTTP server.

All existing call sites are in muxers and they all check that the FIFO
is not empty, and assume that it cannot be emptied asynchronously.

So simplify accordingly.

A lot of playlist probe only check the file extension that returns true for a
directory too.

We need to unselect missing PID on PMT update as some
providers add overlapping delay to the last packet of
prev pid.

reverts commit 50accb82

close #14560

drops the useless tables entries

used to compute sample rate by demux

Some devices fail to resample uncommon rates (like 22050Hz).

Fixes #14514