I don't see a version here

stunnel -version 2012.06.20 16:44:05 LOG7[25078:3074172608]: RAND_status claims sufficient entropy for the PRNG 2012.06.20 16:44:05 LOG7[25078:3074172608]: PRNG seeded successfully 2012.06.20 16:44:05 LOG3[25078:3074172608]: /etc/stunnel/stunnel.pem: No such file or directory (2)

apt-cache search stunnel on Ubuntu has stunnel4