Use standard mtx(9), rwlock(9), sx(9) system initialization macros
instead of doing initialization manually.

Sponsored by:	Nginx, Inc.
Sponsored by:	Netflix
Remove remnants of if_ef(4).
Add support for sending redirections to iSCSI target.

MFC after:	1 month
Sponsored by:	The FreeBSD Foundation
Fix several nits in redirection handling - don't use wrong CSG,
and avoid use-after-free.

MFC after:	1 month
Sponsored by:	The FreeBSD Foundation
Add HISTORY section to ctld(8).

MFC after:	1 month
Sponsored by:	The FreeBSD Foundation
Handle full-path-resolutions to detect the magic-ness of the pkg port.
Translate the errno to gctl_error() texts.

Spotted by:	mwlucas
Report the 1-based key numbers rather than the 0-based ones to be consistent.

Fix documentation for destroy command.  Not sure how the wrong explanation
happened.

Spotted by:	mwlucas
Remove unused 'struct route' fields.
Remove unused 'struct route *' argument from nd6_output_flush().