This is needed for lxc_wait and lxc_monitor to handle lxcpath. However,
the full path name is limited to 108 bytes. Should we use a md5sum of
the lxcpath instead of the path itself?
In any case, with this patch, lxc-wait and lxc-monitor work right with
respect to multiple lxcpaths.
The lxcpath is added to the lxc_handler to make it available most of the
places we need it.
I also remove function prototypes in monitor.h for two functions which
are not defined or used anywhere.
TODO: make cgroups tolerate multiple same-named containers.