systemd-serialgetty: Disable the carrier detect requirement for serial consoles
This aligns the params of getty with the ones used in Debian. From the
getty(8) manpage:
,----[ getty(8) manpage ]
| -L, --local-line
|
| Force the line to be a local line with no need for carrier
| detect. This can be useful when you have a locally attached
| terminal where the serial line does not set the carrier detect
| signal.
`----
Reported-by: Craig McQueen <craig.mcqueen@beamcommunications.com> Signed-off-by: Otavio Salvador <otavio@ossystems.com.br> Signed-off-by: Ross Burton <ross.burton@intel.com>
