Timeout makes it too easy to write crappy code.
It's also much easier to handle EINTR without timeout.

This fixes a minor bug: revents was undefined if poll() failed.

Do not read revents in case of error.
Do not busy loop if POLLERR or POLLHUP get set.

Close #2052, #4039, #4390, #2796
Apparently Goom developers don't understand SIMD registers...

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

includes a fix to correctly link libmpcdec and latest contrib updates

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Some pages are really huge, the only way we are sure we'll
be able to parse them is to download them entirely

This simplifies error and memory handling.
A few memory leaks were fixed.

Modules must be placed in the subfolder modules/ of the zip package.
Accepted file extensions are .luac and .lua (probed in that order)

Main script's name must be "script.lua"
Modules are not supported yet

This will prevent the watchdog window to pop up if the network is slow

If an Extension didn't respond in 10s, a dialog pops up and allows
the user to kill the Extension (thread cancellation)