Merge pull request #2435 from brauner/2018-06-27/storage_managed

[RFC] conf: introduce lxc.rootfs.managed

diff --cc src/lxc/conf.c
Simple merge

diff --cc src/lxc/conf.h
Simple merge

diff --cc src/lxc/confile.c
Simple merge

diff --cc src/lxc/confile_utils.c
Simple merge

diff --cc src/lxc/confile_utils.h
Simple merge

diff --cc src/lxc/lxccontainer.c
Simple merge