debian:~# mv /etc/default/ssh /etc/default/ssh.mv && apt-get -o DPkg::Options::="--force-confmiss" --reinstall install openssh-server  && cat /etc/default/ssh
Reading package lists... Done
Building dependency tree... Done
0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 0 not upgraded.
Need to get 0B/218kB of archives.
After unpacking 0B of additional disk space will be used.
Do you want to continue [Y/n]? y
Preconfiguring packages ...
(Reading database ... 21748 files and directories currently installed.)
Preparing to replace openssh-server 1:4.3p2-7 (using .../openssh-server_1%3a4.3p2-7_i386.deb) ...
Unpacking replacement openssh-server ...
Setting up openssh-server (4.3p2-7) ...

Configuration file `/etc/default/ssh', does not exist on system.
Installing new config file as you request.
Restarting OpenBSD Secure Shell server: sshd.

# Default settings for openssh-server. This file is sourced by /bin/sh from
# /etc/init.d/ssh.

# Options to pass to sshd
SSHD_OPTS=