• Added healthy method to Mojo::Server::Prefork.
  
• Improved all built-in web servers to die if group or user assignment failed.
  
• Improved Hypnotoad to wait for new workers to be ready before stopping the old ones during hot deployment.
  
• Improved commands and log messages to use less punctuation.
  
• Fixed bug in Mojo::IOLoop where the callback passed to next_tick would receive the wrong invocant.
  
• Fixed race condition and memory leak in Mojo::Server::Prefork.