agetty allows to pass "-" as tty port argument and in this case it assumes that
its stdin is already connected to a tty.

However instead of figuring out the real name of "-", it keeps "-" as tty name
internally which leads to uses of '\l' specifier in /etc/issue being
substituted with '-', which is not meaningful.

Can this be fixed so when "-" is passed as argument to agetty, '\l' in
/etc/issue is substituted with the actual name of the tty device being
connected ?

Thanks.