Ignore any error from initramfs-tools' "configure_networking".
* initramfs-tools-script: Wrap call to "configure_networking" with "set +e" and "set -e", since configure_networking was not designed to run in a "set -e" environment.
Closes: 816513 Thanks: Carlos Alberto Lopez Perez <clopez@igalia.com> Thanks: Ben Hutchings <ben@decadent.org.uk>