[RFC] libsodium (PHP 7.2)

Hi all, I'm resurrecting my RFC to add libsodium as a core extension to PHP 7.2. In response to feedback from Pierre Joye, I've outlined which parts of the existing libsodium API I'd like exposed in the core extension. Most notably: - Removed crypto_aead_aes256gcm_* because OpenSSL offers it - Removed crypto_aead_chacha20poly1305_* because crypto_aead_* is awaiting the CAESAR winner https://competitions.cr.yp.to/caesar.html - Removed crypto_pwhash_scryptsalsa208sha256_* because we have Argon2i now If anyone would like to weigh in on this in the next few weeks, I'd greatly appreciate it. I'm also developing a polyfill for most of the API features (except pwhash): https://github.com/paragonie/sodium_compat Warm regards, Scott Arciszewski Chief Development Officer Paragon Initiative Enterprises <https://paragonie.com>