Add IPv6 transport for bsnmp.

This patch adds a new table begemotSnmpdTransInetTable that uses the
InetAddressType textual convention and can be used to create listening
ports for IPv4, IPv6, zoned IPv6 and based on DNS names. It also supports
future extension beyond UDP by adding a protocol identifier to the table
index. In order to support this gensnmptree had to be modified.

Submitted by: harti
MFC after: 1 month
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D16654

Add to bsnmpd(1) ability to specify multiple community strings with
different access rights.

By default there are two community strings with index 1 and 2, one for
read-only access and second for read-write access:

begemotSnmpdCommunityString.0.1 = $(read)
begemotSnmpdCommunityString.0.2 = $(write)

Now it is possible to define additional community strings using different
indexes:

begemotSnmpdCommunityString.0.3 = "SomeString1"
begemotSnmpdCommunityPermission.0.3 = 1
begemotSnmpdCommunityString.0.4 = "SomeString2"
begemotSnmpdCommunityPermission.0.4 = 2
begemotSnmpdCommunityString.0.5 = "SomeString3"
begemotSnmpdCommunityString.0.6 = "SomeString4"

New attribute begemotSnmpdCommunityPermission can be used to specify access
rights: 1 means "read-only" access, 2 means "read-write" access. If
attribute is not specified for some index this means "read-only" rights.

Community strings must be unique, i.e. must not be the same for different
indexes.

Obtained from: Yandex LLC
MFC after: 2 weeks
Sponsored by: Yandex LLC
Differential Revision: https://reviews.freebsd.org/D13785

Use uint32_t instead of u_int32_t for or_last_change and services in "struct systemg"

This is being done to match "struct systemg" in snmpmod(3)

No functional change

MFC after: 3 days

style(9): clean up trailing whitespace

MFC after: 3 weeks

Include sys/queue.h: snmpmod.h uses TAILQ.

PR: bin/153153
MFC after: 2 weeks

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@

A new jail(8) with a configuration file, to replace the work currently done
by /etc/rc.d/jail.

Create the altix project branch. The altix project will add support
for the SGI Altix 350 to FreeBSD/ia64. The hardware used for porting
is a two-module system, consisting of a base compute module and a
CPU expansion module. SGI's NUMAFlex architecture can be an excellent
platform to test CPU affinity and NUMA-aware features in FreeBSD.

- Import the HEAD csup code which is the basis for the cvsmode work.

Virgin import of bsnmpd 1.12

Vendor patch: string_get_max() function to return strings with a maximum
SNMP string length.

Virgin import of bsnmpd 1.11

Virgin import of bsnmpd 1.10

Virgin import of bsnmpd 1.7

Virgin import of bsnmpd 1.5a

Virgin import of bsnmp 1.4