I know how to check openssl version, question was about bitcoin-qt binary package from ppa
Just open the debug window and you will see what version of OpenSSL the executable was linked against.
Kind of makes me glad I haven't bothered upgrading openssl in some time.
*blank stare*
Like you said, there is LibreSSL.

Not stable or tested enough yet.
People, stop suggesting LibreSSL. One can seriously fuck up his/hers system by replacing a core library by an unstable solution.
Once LibreSSL is proven not to be dangerous, it can be used instead of OpenSSL