Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

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

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

Bump shared libraries version numbers in preparation for 9.0.
This time, only libraries which ABI has been changed compared to
stable/8, are bumped.

ABI analysis done by: Gleb Kurtsou
Approved by: re (kensmith)

Unbreak the build by temprorarily not using include directives in
bsnmpd(1)' def files, until bsd.snmpmod.mk & Makefiles are fixed to
pass proper include path flags to gensnmptree.

Bring in a SNMP module that allows configuration of SNMPv3 Notification targets.

Sponsored by: The FreeBSD Foundation
Reviewed by: philip
Approved by: philip

In bsnmpd(1) add support for SNMPv3 message processing model, including message authentication, packet encryption & view-based access control (RFC 3412, 3414, 3415).

Sponsored by: The FreeBSD Foundation
Reviewed by: philip@ (mostly)
Approved by: philip@

Always assign WARNS using ?=

- fix some nearby style bugs
- include Makefile.inc where it makes sense and reduces duplication

Approved by: ed (co-mentor)

Catch up with the import of bsnmp-1.11. Add a couple of new
configuration flags to CFLAGS and set the WARNS level to 6.

Add the right CFLAGS to show that we have err.h, getaddrinfo and strlcpy.
Add support.c to the list of source files.

Move libbsnmp.so to /lib so that it is available to atmconfig.
At the moment the only dependency on this library is bsnmpd.

Approved by: silence on re@

Clean up makefiles.

Reviewed by: harti

Fixed the fatal bug: CFLAGS should be added to, not overridden.
This prevented CPU and optimization flags to be added here.

Add build infrastructure for libbsnmp and the modules. Add the
netgraph module for the SNMP daemon.