Fix OIdentdConfigGenerator double-printing on ssl

connected() is always connected to socketInitialized().
encrypted() is also connected to socketInitialized() when ssl is enabled.

socketInitialized() fires socketOpen(...) unconditionally, but does not fire socketInitialized(...) if we're using SSL without encryption yet - see line 464.

With socketOpen(...) connected to OIdentdConfigurationGenerator::addSocket, OIdentdConfigurationGenerator writes to .oidentd.conf twice for every connection.

Changing this to have socketInitialized(...) connected instead prevents this duplication.