OpenBSD kqueue EV_RECEIPT and EV_DISPATCH
OpenBSD kqueue EV_RECEIPT and EV_DISPATCH

OpenBSDs kqueue now has EV_RECEIPT and EV_DISPATCH.

I wrote a patch and the devs merged it into current:
https://marc.info/?l=openbsd-tech&m=149621427511219&w=2

This change extends the rust libc crate to provide the feature.

cactorium/libc,rust-lang/libc,rust-lang-nursery/libc,rust-lang-nursery/libc,rust-lang-nursery/libc,rust-lang/libc,cactorium/libc,cactorium/libc,rust-lang/libc