S/Key Libraries:
http://www.sparc.spb.su/solaris/skey/
+LibEdit:
+
+sftp now supports command-line editing via NetBSD's libedit. If your
+platform has it available natively you can use that, alternatively
+you might try these multi-platform ports:
+http://www.thrysoee.dk/editline/
+http://sourceforge.net/projects/libedit/
+
If you wish to use --with-skey then you will need the above library
installed. No other current S/Key library is currently known to be
supported.
For more information on configuration, please refer to the manual pages
for sshd, ssh and ssh-agent.
-4. Problems?
+4. (Optional) Send survey
+-------------------------
+
+$ make survey
+[check the contents and make sure there's no sensitive information]
+$ make send-survey
+
+This will send configuration information for the currently configured
+host to a survey address. This will help determine which configurations
+are actually in use, and what valid combinations of configure options
+exist. The raw data is available only to the OpenSSH developers, however
+summary data may be published.
+
+5. Problems?
------------
If you experience problems compiling, installing or running OpenSSH.