Redo fix for CID 979581

The previous change was flawed in terms of how it calculated the
buffer length for the sockaddr_un object. Use SUN_LEN where
appropriate and mute the Coverity complaint by us

Redo fix for CID 979581

The previous change was flawed in terms of how it calculated the
buffer length for the sockaddr_un object. Use SUN_LEN where
appropriate and mute the Coverity complaint by using memset(.., 0, ..)
to zero out the entire structure instead of setting .sun_len to a bogus
value and strlcpy'ing in the contents of argv[1].

SUN_LEN is now being passed to bind(2) as well. For some odd reason
this wasn't flagged as a bug with Coverity.

Reported by: jilles, jmallett
MFC after: 2 days
X-MFC with: r311233

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Fix Coverity issues

- Initialize .sun_len before passing it to strlcpy and bind.
- Close fd on error

MFC after: 3 days
Reported by: Coverity
CID: 978283, 979581

Port contrib/netbsd-tests/fs/tmpfs/h_tools.c to FreeBSD

- Add inttypes.h #include for PRId64 macro
- Use FreeBSD's copy of getfh(2), which doesn't include a `fh_size` parameter.
Use sizeof(fhandle

Port contrib/netbsd-tests/fs/tmpfs/h_tools.c to FreeBSD

- Add inttypes.h #include for PRId64 macro
- Use FreeBSD's copy of getfh(2), which doesn't include a `fh_size` parameter.
Use sizeof(fhandle_t) instead as the size of fhp is always fixed as
fhandle_t, unlike NetBSD's copy of fhp, which is void*.

MFC after: 2 weeks
Sponsored by: EMC / Isilon Storage Division

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Import the NetBSD test suite from ^/vendor/NetBSD/tests/09.30.2014_20.45 ,
minus the vendor Makefiles

Provide directions for how to bootstrap the vendor sources in
FREEBSD-upgrade

MFC after 2 weeks

Import the NetBSD test suite from ^/vendor/NetBSD/tests/09.30.2014_20.45 ,
minus the vendor Makefiles

Provide directions for how to bootstrap the vendor sources in
FREEBSD-upgrade

MFC after 2 weeks
Discussed with: rpaulo
Sponsored by: EMC / Isilon Storage Division

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