Reinstitate send() after syslogd restarts.

In r228193 the test of CONNPRIV have been moved to before the _usleep
and send in vsyslog().  When syslogd restarts, this would prevent the
message being logged after the disconnect/connect dance for
scenario #1.

PR:		194751
Submitted by:	Peter Creath <pjcreath+freebsd gmail com>
Reviewed By:	glebius
MFC after:	2 weeks
Differential Revision: https://reviews.freebsd.org/D1227
In preparation for using clang's -Wcast-qual:

Use __DECONST (instead of my own attempted re-invention) for the iov
parameters to jail_get/set(2).  Similarly remove the decost-ish hack
from execvp's argv, except the __DECONST is only added at very end.

While I'm at it, remove an unused variable and fix a comment typo.
Define missing libraries to be able to convert gnu, cddl and secure to LIBADD
Convert to LIBADD
Reduce overlinking
Convert svn to LIBADD reduce overlinking
Defines the libssh dependencies
Register the explicit (pthread) and implicit (for static) dependencies for
kerberos
Reduce overlinking
The framework now ensure by itself that pthread is added to the link chain
as the last component if linked to kerberos hence avoid with out any explicit
addition prevent issue like CVE-2014-8475
Convert to LIBADD
Remove all remnant ugly LD<lbname> but atf one until the aft framework knows
about LIBADD
Remove now useless USEPRIVATELIB
Convert to LIBADD
Revert r273060 per discussion with avg@ as we need to make L2ARC
aware of 4K devices and this one is not the right fix anyway.
Add bunch of PCI IDs of Intel Wildcat Point (9 Series) chipsets.

MFC after:	1 week
Convert to LIBADD
Convert to LIBADD
Remove MINUSLPAM the LIBADD framework handles static dependencies just fine
Add support for 64-byte CQE size.

Sponsored by:	Mellanox Technologies
MFC after:	3 days
Add new USB quirk.

MFC after:	1 week
PR:		195372
Make isp_find_pdb_by_*() search for targets in portdb in reverse order.

Records with target_mode == 1 are allocated from the end of portdb, so it
seems logical to start search from the end not traverse whole array.

MFC after:	1 month