Revert "ext/sodium: throw exceptions instead of errors"

This reverts commit c05cbd1e775fa69ed9939796a908390f2bfb4459.

ext/sodium: throw exceptions instead of errors

ext/sodium: pwhash: do not warn on low parameters
but raise an explicit error if these are too low

Fix uninitialized vars

ext/sodium: sodium_compare() is always available

ext/sodium: fix funky indentation

ext/sodium: move pwhash_scrypt() after pwhash()

ext/sodium: checks for crypto_box_SEALBYTES are not required

ext/sodium: explicitly include <string.h>

ext/sodium: zend_parse_parameters -> zend_parse_parameters_throw

ext/sodium: fix funky indent on zend_parse_parameters_throw() calls

ext/sodium: import bindings for secretstream

ext/sodium: add crypto_pwhash_str_needs_rehash()

Also properly define xchacha20poly1305_ietf_keygen()

ext/sodium: +base64 codecs (timing-safe)

ext/sodium: add arginfo definitions that will be required later

Don't check for existence of aesgcm symbols, since we only support
libsodium >= 1.0.8

ext/sodium: sort prototypes

ext/sodium: call crypto_pwhash_argon2id() explicitly if required

ext/sodium: avoid tautological comparisons

ext/sodium: signing empty messages is fine

ext/sodium: avoid negations on unsigned values

ext/sodium: throw an exception if only the prefix of a hex string is valid

Improve sodium "invalid parameters" error messages

Fix a few places where ZPP throw got reverted to ZPP

Fix symbol name

ext/sodium: the second parameter of sodium_hex2bin() is optional