The modes bob, linear, yadif, yadif2x cannot be used anymore
until the core is extended.

Only the autocrop feature is really lost with that but it was very
inefficient.

It will have to be converted to "video filter2".

It will have to be converted to "video filter2" (and the core extended
to support output format changes).

X11 and win32 opengl modules are not impacted by this change.

TB.

It isn't complete yet (no mouse/crop/...).

This removes support for non converted "video output" and "video filter"
modules.

It only works for vout display modules.

Pitch of input and output pictures can be differents...
BP.

gethostbyname() is not thread-safe.

This patch is not used in Windows. getaddrinfo() requires XP, and
gethostbyname is thread-safe with Winsock.

inet_ntoa() is not thread-safe (except with Winsock)

Use readdir_r() instead of readdir().

First I ever need to use the auto keyword...

Packagers shall be responsible for fixing FluidSynth thread-safety
issues if they choose to use this old buggy version.

(Note that we have no demux capable of generating this. This one message
 cannot be found in Standard MIDI File.)

Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>