Backports for random_bytes() and random_int() in PHP 5.x

Hi internals team, Work on a backport for random_bytes() and random_int() is nearly finished. If php-src pull requests 1397 and 1398 are merged, then our polyfill is 100% compatible even in failure conditions. However, before I tag a v1.0.0 release, I'd greatly appreciate it if more people would take a look at the code or test the implementation so I can say, with sufficient confidence, that the library is secure, reliable, and true to the PHP 7 implementation. https://github.com/php/php-src/pull/1397 https://github.com/php/php-src/pull/1398 It's also on Packagist under paragonie/random_compat if that helps anyone acquire it (and, once v1.0.0 is released, include it in your projects easier). Please share this with any crypto / security folks that might be interested in reviewing it. https://github.com/paragonie/random_compat/issues/11 Thanks, Scott Arciszewski Chief Development Officer Paragon Initiative Enterprises <https://paragonie.com>