Display a warning message if built against an old version of OpenSSL.
Display a warning message if built against an old version of OpenSSL.

WyseNynja/vanitygen,samr7/vanitygen,colindean/vanitygen,Gamecredits-Universe/vanitygen-gamecredits,sobakasu/vanitygen,Instigo/vanitygen,bither/vanitygen,dooglus/vanitygen,Stoner19/NEOS-vanitygen,inuitwallet/vanitygen,dooglus/vanitygen,luke-jr/vanitygen,shinohai/vanitygen,kangaderoo/vanitygen,enlighter/vanitygen,isghe/vanitygen,kangaderoo/vanitygen,Cremator/vanitygen,sobakasu/vanitygen,clovermebitcoin/test,Cremator/vanitygen,kangaderoo/vanitygen,fantomgs/vanitygen,sobakasu/vanitygen,WyseNynja/vanitygen,enlighter/vanitygen,bespike/vanitygen,clovermebitcoin/test