Building IMAP-UW with SSL Support
Poking around, I discovered that IMAP-UW does indeed support SSL. However, the FreeBSD package was built without it. To get SSL support, I had to set an environment variable WITH_SSL and rebuild, from the ports collection, cclient and imap-uw and install those. Then I had to have inetd listen on the imaps port (993).
The documentation for IMAP-UW disavows any desire to tell me how to create the SSL certificate. See my document on SSL Certificates for a reference on how to do this. I self-sign mine, but Mozilla complains about it every time I connect. IMP can be configured to not complain.
Name the certificate imapd.pem and store it in the /usr/local/certs directory.