• Removed deprecated watch attribute from Mojo::Server::Morbo.
  
• Added spare attribute to Mojo::Server::Prefork.
  
• Added -s option to prefork command.
  
• Added fd option to Mojo::IOLoop::Server::listen.
  
• Added fd parameter to Mojo::Server::Daemon::listen.
  
• Added spare setting to Hypnotoad.
  
• Increased default graceful_timeout from 20 to 60 seconds and heartbeat_timeout from 20 to 30 seconds in
  Mojo::Server::Prefork.