Install libsodium (a.k.a. sodium) on all servers by default
libsodium (a.k.a. sodium) is a PHP PECL library for secure encryption in PHP. As of PHP 7.2, libsodium will be included as a core library in PHP.
It would be helpful for those of us building secure PHP applications to have access to this library now instead of waiting for PHP 7.2. This will enable us to use encryption methods that will be good for many years to come instead of being deprecated as mcrypt is now.
Note that there is a polyfill that can be used until PHP 7.2 if libsodium isn't installed, but it is not nearly as efficient as having libsodium. Here is the polyfill: https://github.com/paragonie/sodium_compat