Fixes compilation

Signed-off-by: Rosen Penev <rosenp@gmail.com>

This backports upstream fix from the master branch.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>

This is the first bugfix release for LXC 2.1. Full list of changes can
be found here:

https://linuxcontainers.org/lxc/news/

Signed-off-by: Marko Ratkaj <marko.ratkaj@sartura.hr>

Bump LXC package from 1.1.5 to 2.1.0. Version 2.x includes many
improvements and optimizations.

https://linuxcontainers.org/lxc/news/

Some tools like lxc-top are rewritten in C and are no longer broken and
dependent on lua.

Signed-off-by: Marko Ratkaj <marko.ratkaj@sartura.hr>

Signed-off-by: Marko Ratkaj <marko.ratkaj@sartura.hr>

Initialize ret to 0 so compiler no longer complains about
monitor.c: In function 'lxc_monitor_open':
monitor.c:212:5: error: 'ret' may be used uninitialized in this function [-Werror=maybe-uninitialized]

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

Signed-off-by: Alex Samorukov <samm@os2.kiev.ua>

Signed-off-by: Mario Halambek <mario.halambek@sartura.hr>

Signed-off-by: Marko Ratkaj <marko.ratkaj@sartura.hr>
Signed-off-by: Luka Perkov <luka@openwrt.org>

Signed-off-by: Luka Perkov <luka@openwrt.org>

Signed-off-by: Luka Perkov <luka@openwrt.org>

Signed-off-by: Luka Perkov <luka@openwrt.org>

Signed-off-by: Luka Perkov <luka@openwrt.org>

Signed-off-by: Petar Koretic <petar.koretic@sartura.hr>

Signed-off-by: Petar Koretic <petar.koretic@sartura.hr>

Signed-off-by: Luka Perkov <luka@openwrt.org>

Signed-off-by: Luka Perkov <luka@openwrt.org>