* guix/scripts/container/exec.scm (partition-args): Reimplement such that all args up to and including the PID are returned as the first of the two values.
* guix/scripts/container.scm: New file. * guix/scripts/container/exec.scm: New file. * po/guix/POTFILES.in: Add them. * Makefile.am (MODULES): Add them. * doc/guix.texi (Invoking guix container): New section.