Add CRYPTO_BOX_SEALBYTES, CRYPTO_BOX_MACBYTES and CRYPTO_SECRETBOX_MACBYTES.
Add CRYPTO_BOX_SEALBYTES, CRYPTO_BOX_MACBYTES and CRYPTO_SECRETBOX_MACBYTES.

paragonie/libsodium-php,jedisct1/libsodium-php,remicollet/libsodium-php,paragonie/libsodium-php,remicollet/libsodium-php,jedisct1/libsodium-php,thebigb/libsodium-php,thebigb/libsodium-php,remicollet/libsodium-php,jedisct1/libsodium-php,paragonie/libsodium-php