Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

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

Move _bsnmptools_debug extern from bsnmpmap.c to bsnmptools.h

It was used in bsnmpmap.c but was stored in bsnmptools.c; moving the extern
to the header allows us to cover all of our bases for the variable, and allows
_bsnmptools_debug to be used in the future elsewhere -- not just bsnmpmap.c.

MFC after: 3 weeks
Sponsored by: EMC / Isilon Storage Division

Implement an option to execute SNMP walks using GETBULK requests in bsnmpwalk(1)
retrieving multiple values with a Single PDU.

Reviewed by: philip@
Tested by: tsanand129 (at) gmail (dot) com

Spelling fixes for usr.sbin/

Add bsnmpd(1)'s SNMP client tools (including SNMPv3 support) to the base system.

Sponsored by: The FreeBSD Foundation (the SNMPv3 bits), Google Summer of Code 2005
Reviewed by: philip@ (mostly), bz@ (earlier version based on p4 ch124545)
Approved by: philip@