libopvpnutil.so links against ABI-unstable platform libcrypto.so
The library libopvpnutil.so links against an ABI unstable libcrypto.so from some random version of the platform. This should either be statically linked with the crypto library or a differently-named version should be included (e.g., don't use the filename libcrypto.so because it conflicts with the platform).
(from redmine: created on 2015-04-30)