Starlet, a new PSGI web server

kazuho's Starlet at master - GitHub

Kazuho Oku agreed to take over the preforking bit from the Plack bundled web server HTTP::Server::PSGI as a new HTTP server called Starlet (a good name to indicate that it's like a mini-Starman :))

This is a backward incompatible change if you're using the default server with --max-workers option. It now falls back to single-process mode with warnings printed. However we already sent out the warning a couple of times that it would be deleted, and most people have switched over to Starman already, so i hope it's not a big deal breaker.