Duplicate ​"​​crypto_aead_*" constants

[Jack-Edwards]

Printing the sodium module in the browser reveals some duplicate constant values. Their only differentiation is whether "IETF" is uppercase or lowercase.

Which set is "more correct"? I don't want to map both sets, nor do I want to map the one set that may be removed in the future.

Uppercase IETF:

• crypto_aead_chacha20poly1305_IETF_ABYTES: 16
• crypto_aead_chacha20poly1305_IETF_KEYBYTES: 32
• crypto_aead_chacha20poly1305_IETF_MESSAGEBYTES_MAX: -17
• crypto_aead_chacha20poly1305_IETF_NPUBBYTES: 12
• crypto_aead_chacha20poly1305_IETF_NSECBYTES: 0
• crypto_aead_xchacha20poly1305_IETF_ABYTES: 16
• crypto_aead_xchacha20poly1305_IETF_KEYBYTES: 32
• crypto_aead_xchacha20poly1305_IETF_MESSAGEBYTES_MAX: -17
• crypto_aead_xchacha20poly1305_IETF_NPUBBYTES: 24
• crypto_aead_xchacha20poly1305_IETF_NSECBYTES: 0

Lowercase IETF:

• crypto_aead_chacha20poly1305_ietf_ABYTES: 16
• crypto_aead_chacha20poly1305_ietf_KEYBYTES: 32
• crypto_aead_chacha20poly1305_ietf_MESSAGEBYTES_MAX: -17
• crypto_aead_chacha20poly1305_ietf_NPUBBYTES: 12
• crypto_aead_chacha20poly1305_ietf_NSECBYTES: 0
• crypto_aead_xchacha20poly1305_ietf_ABYTES: 16
• crypto_aead_xchacha20poly1305_ietf_KEYBYTES: 32
• crypto_aead_xchacha20poly1305_ietf_MESSAGEBYTES_MAX: -17
• crypto_aead_xchacha20poly1305_ietf_NPUBBYTES: 24
• crypto_aead_xchacha20poly1305_ietf_NSECBYTES: 0 ​

[jedisct1]

Use the lowercase ones (crypto_aead_chacha20poly1305_ietf_ABYTES).

The other ones are for backward compatibility with a very old version of libsodium.