- This commit adapts lxc-clone to be similiar in usage and feel to the other lxc-* executables. It builds on the previous extension of the lxc_argument struct and now uses the default lxc_arguments_parse() function. - Options which were not used have been removed. - The LXC_CLONE_KEEPNAME flag was not respected in the previous version of lxc-clone. The culprit is a missing if-condition in lxccontainer.c. As this requires a change in one of the API functions in lxccontainer.c it will be addressed in a follow-up commit. Signed-off-by: Christian Brauner <christianvanbrauner@gmail.com>