ssl_openssl_lib tries to set SSLLibFile/SSLUtilFile variables with the filename of the loaded li braries. This does not work on FPC/Linux:
It calls synafpc.GetModuleFileName to find the filename, but that function is not actually implemented. There is just a single line Result := 0;
There is a wrapper GetLibFileName with a THandle parameter. THandle is 32-bit on FPC. It needs to use TLibHandle which is 64-bit, otherwise it fails with a rangecheck error.
There is no need to set the filenames so it could just be removed (in patch). Or set the filenames when calling LoadLibrary with their filename (and as a reminder: LoadLibrary also crashs with a rangecheck error due to #42)