commoncpp2-1.8.1 fails to build with openssl-1.1 and libressl

[Stefan Strogin]

./configure --with-openssl

(...)
ssl.cpp: In member function ‘bool ost::SSLStream::getSession()’:
ssl.cpp:358:23: error: ‘SSLv3_client_method’ was not declared in this scope
     ctx = SSL_CTX_new(SSLv3_client_method());
                       ^~~~~~~~~~~~~~~~~~~
ssl.cpp:358:23: note: suggested alternative: ‘SSLv23_client_method’
     ctx = SSL_CTX_new(SSLv3_client_method());
                       ^~~~~~~~~~~~~~~~~~~
                       SSLv23_client_method

Details and build logs: https://bugs.gentoo.org/674416

SSLv3_client_method() is deprecated in openssl-1.1 and libressl.
They suggest to use SSLv23_client_method.

--
Stefan