* Replace fch{mod,own} with straight ch{mod,own} as the former cannot be used
on socket file descriptors
* Open permissions on /var/run/devd.pipe so that any user can read devd events
from this socket
* Enable non-blocking I/O on devd.pipe to keep clients from wedging devd.
If a write(2) on devd.pipe would block, the client in question will be
removed
Approved by: re (kensmith)
2acfae159d