logrotate: Improve configurability of the installed systemd service files
This makes it possible to add extra options to the logrotate
application (via ${LOGROTATE_OPTIONS}), and it allows the Persistent
option in logrotate.timer to be configured via
${LOGROTATE_SYSTEMD_TIMER_PERSISTENT}.
It also changes the sed expressions to allow for
${LOGROTATE_SYSTEMD_TIMER_BASIS} to contain commas without having to
prefix them with backslahes, e.g.:
LOGROTATE_SYSTEMD_TIMER_BASIS = "*-*-* *:00,30:00"
Signed-off-by: Peter Kjellerstedt <peter.kjellerstedt@axis.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
