const crypto/tls.noncePrefixLength

3 uses

	crypto/tls (current package)
		cipher_suites.go#L445: 	noncePrefixLength = 4
		cipher_suites.go#L456: func (f *prefixNonceAEAD) NonceSize() int        { return aeadNonceLength - noncePrefixLength }
		cipher_suites.go#L506: 	if len(noncePrefix) != noncePrefixLength {