mod_cloud_notify_encrypted: Use new 'util.crypto' on Prosody 13.0 This removes the dependency on lua-luaossl when running on Prosody 13.0 (or trunk) which has util.crypto Compatibility with Prosody 0.12 retained but also the dependency

This module produces more detailed HTTP logs for Prosodys built-in HTTP
server. The format is similar to that of Apache and go into Prosodys
normal logs at the `info` level.