OPENSSL_config declaration

As described at this [topic](http://stackoverflow.com/questions/10959771/openssl-and-gost-engine-issue-statically-linked) we should call OPENSSL_config before using GOST cipher and digest algorithms. There is no way to deal it on the other hand.

Please review and merge this PR or do the same thing on your own way. This feature is critically important for our company.
Our style guide is to write this as `const char *` (extra space).