Sync with reality

1. We've been using OpenSSL-1.0.2 for months (branch: piotr/openssl-1.0.2).
2. Add patch to disable RC4 for TLS v1.1+ (branch: piotr/disable_rc4).
3. Make RC4 the least preferred cipher (branch: piotr/deprioritize_rc4).

Single pull request in order to preserve linear history, feel free to pick changes one-by-one from their respective branches.