ffmpeg: update to 2.3.1

Changes:
Disable SIMD usage; creates build errors
Disable runtime cpudetect as it's all disabled
Re-enable compiler optimizations
re-enable stripping

Signed-off-by: Ian Leonard <antonlacon@gmail.com>
ffmpeg: Have the custom Vorbis decoder support select the Ogg demuxer.

Signed-off-by: Ian Leonard <antonlacon@gmail.com>
ffmpeg: Drop the libdlna profile from the Custom ffmpeg option. Libdlna is no longer in the package feed, and has an inactive
upstream.

Signed-off-by: Ian Leonard <antonlacon@gmail.com>
ffmpeg: add audio-dec profile to libffmpeg-custom

Signed-off-by: Ian Leonard <antonlacon@gmail.com>
ffmpeg: add external libraries section to Config.in

Signed-off-by: Ian Leonard <antonlacon@gmail.com>
ffmpeg: improve minidlna profile

Minidlna has no need to mux streams, or be able to read network streams at this point in time, so remove this support from
libffmpeg.

Synchronize the minidlna profile between libffmpeg-ucstom and libffmpeg-mini.

Signed-off-by: Ian Leonard <antonlacon@gmail.com>
vips: disable PKG_CHECK_FORMAT_SECURITY

Signed-off-by: Etienne CHAMPETIER <champetier.etienne@gmail.com>
Merge pull request #195 from antonlacon/ffmpeg-2.3.x

ffmpeg: Update to 2.3.1 and other cleanup
Add smartsnmpd.

smartsnmpd is an implementation of SNMP Agent developed by Credo Semi. It
use Lua as script language to write SNMP MIB nodes to improve the efficiency
of developtment.

This package add native support for OpenWrt. Include using ubus and uci to
get status/info. And, it use uloop as low level event library. So it's
some sort of desgin for OpenWrt.

Website: https://github.com/credosemi/smartsnmp

Signed-off-by: Leo Ma <leoma@credosemi.com>
Signed-off-by: Xiongfei Guo <xfguo@credosemi.com>
Merge pull request #198 from credosemi/pr-smartsnmpd

Add smartsnmpd.