Log Message:
libsodium: updated to 1.0.19

Version 1.0.19
  This release includes all the changes from 1.0.18-stable, as well as two
additions:

 - New AEADs: AEGIS-128L and AEGIS-256 are now available in the
`crypto_aead_aegis128l_*()` and `crypto_aead_aegis256_*()` namespaces.
AEGIS is a family of authenticated ciphers for high-performance applications,
leveraging hardware AES acceleration on `x86_64` and `aarch64`. In addition
to performance, AEGIS ciphers have unique properties making them easier and
safer to use than AES-GCM. They can also be used as high-performance MACs.
 - The HKDF key derivation mechanism, required by many standard protocols, is
now available in the `crypto_kdf_hkdf_*()` namespace. It is implemented for
the SHA-256 and SHA-512 hash functions.
 - The `osx.sh` build script was renamed to `macos.sh`.
 - Support for android-mips was removed.