Allow moving arguments in aliases
Allow moving arguments in aliases

This makes it possible to create much more complex aliases like:

    aliases:
      console: exec @ARGS@ -- bash

Which will define a new "lxc console" command that will execute
"lxc exec <arguments> -- bash".

Closes #1395

Signed-off-by: Stéphane Graber <089afc6d81f66f1168a9849e15660feae286e024@ubuntu.com>

lxc/lxd-pkg-ubuntu,lxc/lxd-pkg-ubuntu,lxc/lxd-pkg-ubuntu