std: fix sendfile on macOS and FreeBSD

- fix std.os.sendfile/FreeBSD use correct in/out fd_t
- fix std.os.sendfile/macOS use correct in/out fd_t
- undo 1141bfb21b82f8d3fc353e968a591f2ad9aaa571 (no longer needed)
- fix c.freebsd.sendfile use off_t value
- fix c.freebsd.sendfile decl correct in/out fd_t
- fix c.darwin.sendfile decl correct in/out fd_t

fix signature param names
d31b65e762Michael Dusan committed on 3/6/2020, 1:46:28 AM· committed by Andrew Kelleyparent428677e
3 files changedLine totals unavailable