Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

o style.Makefile(5): WARNS= -> WARNS?=.

Add a simple regression test for stream UNIX domain sockets and the
bind()/connect() system calls, which is intended to confirm that the
right successes and errors occur when rendezvousing via the file system
name space.