Bug#422869: please don't disable local (non-serial) consoles when installing via serial console

[John Morrissey <jwm@horde.net>]

Package: finish-install
Version: 2.10
Severity: wishlist

#274649 modified finish-install to have the finished system start a getty on
the serial port used for installation and update /etc/securetty so root can
log into it (thank you!).

At the same time, it disables the gettys on the local console (tty[1-6]).
We often install via serial console with ipmitool(1), but also use the local
console from time to time. It would be nice if finish-install simply kept
these gettys around, or offered an option to do so (perhaps a debconf
question that we could preseed?).

-- System Information:
Debian Release: 4.0
  APT prefers stable
  APT policy: (500, 'stable')
Architecture: i386 (i686)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.18-4-686
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)