Command line runner for Wai apps (using Warp) with support for UNIX domain sockets,
TLS (can be turned off with a cabal flag to avoid compiling the TLS library), CGI,
socket activation (systemd-compatible, but see https://github.com/myfreeweb/soad for a more interesting (and not linux-only) thing than what systemd does),
and graceful shutdown (on TERM signal).