This also fix a bug where CTRL-C'ing redbean on Linux would kill the
browser process. It furthermore fixes a regression with the APE self
repair process that happened in a recent change.
See #158
If your redbean `/.init.lua` file defines a global callable named
`OnHttpRequest` then redbean will delegate all serving control to
your function. You may then restore the default serving paths, by
calling the new `Route()`, `RouteHost()`, and `RoutePath()` APIs.
Closes#150
