I don't know whether the ssl linked library was the old behaviour or not, but the current lftp works a little differently.
> whereis lftp
lftp: /usr/bin/lftp /etc/lftp.conf /usr/lib64/lftp /usr/share/man/man1/lftp.1.gz
> cd /usr/lib64/lftp> ls * cmd-mirror.so cmd-torrent.so liblftp-pty.so proto-fish.so proto-http.so
cmd-sleep.so liblftp-network.so proto-file.so proto-ftp.so proto-sftp.so
SFTP support established. 27.33.96.38 01:10, July 14, 2013 (UTC)