websocket.erl: Remove gratuitous call to rand:seed/1 #419
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crypto:strong_rand_bytes/1 doesn't need seeding: "Generates N bytes randomly uniform 0..255, and returns the result in a binary. Uses a cryptographically secure prng seeded and periodically mixed with operating system provided entropy. By default this is the RAND_bytes method from OpenSSL." https://www.erlang.org/docs/25/man/crypto#strong_rand_bytes-1
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crypto:strong_rand_bytes/1 doesn't need seeding:
"Generates N bytes randomly uniform 0..255, and returns the result in a binary. Uses a cryptographically secure prng seeded and periodically mixed with operating system provided entropy. By default this is the RAND_bytes method from OpenSSL."
https://www.erlang.org/docs/25/man/crypto#strong_rand_bytes-1