srt: re-enable passphrase
With refactoring, supporting passphrase was removed accidently. This commit re-enables srt encryption and validates 'passphrase' by checking the return value of 'srt_setsockopt'.
fix: #694 (closed)
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With refactoring, supporting passphrase was removed accidently. This commit re-enables srt encryption and validates 'passphrase' by checking the return value of 'srt_setsockopt'.
fix: #694 (closed)