Original source can be downloaded from OpenBSD at
ftp://ftp.openbsd.org/pub/OpenBSD/OpenSSH/portable/

A list of deleted files is in README.DELETED.

CVS import hint:
cvs import src/crypto/openssh-4 OPENSSH v4_?p1

Upgrading notes:
./configure --with-pam --with-tcp-wrappers --without-xauth --with-libedit
Update config.h and version.h in secure/lib/libssh.
Update ssh{,d}_config and ssh{,d}_config.5 in secure/usr.bin/ssh and
secure/usr.sbin/sshd.