another gcrypt documentation suggestion: gcry_free results of gcry_random_bytes

[Daniel Kahn Gillmor]

hey folks--

i think section 8.2 of the gcrypt documentation ("Retrieving Random
Numbers") should indicate that the buffers returned by gcry_random_bytes
and gcry_random_bytes_secure should be released with gcry_free when they
are no longer needed.

	--dkg

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