inittab: Start shell only if console is not null

[Harald Becker]

Hi !

> console::respawn:/sbin/getty -L 115200 ttyS0 vt100
>

This is a special Busybox feature. BB uses the id field to specify a tty 
device, used to start the inittab command. If the device open fails, the 
inittab line is skipped.

 From examples/inittab:

# <id>: WARNING: This field has a non-traditional meaning for BusyBox init!
#
#       The id field is used by BusyBox init to specify the controlling 
tty for
#       the specified process to run on.  The contents of this field are
#       appended to "/dev/" and used as-is.  There is no need for this 
field to
#       be unique, although if it isn't you may have strange results.  
If this
#       field is left blank, then the init's stdin/out will be used.

Harald