- Use custom verifier instead of boost's rfc2818_verification() which does not appear to support server name indirection (SNI) and results in certificate verification error. - Enforce usage of TLS 1.2 when connecting to bitnodes.21.co.
- Use custom verifier instead of boost's rfc2818_verification() which does not appear to support server name indirection (SNI) and results in certificate verification error.
- Enforce usage of TLS 1.2 when connecting to bitnodes.21.co.

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