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)

Use the new bsd.snmpmod.mk makefile to build the modules. The -I pointers
into the contrib directory are still necessary for some of the Makefiles,
because the C-sources there use non-canonical includes ("" includes) to get
at the header files.

No need to specify the include subdirectory. During buildworld the
correct files are included from a temp. include directory.

Explained by: ru

This module was wrongly including header from /usr/include. Give it
the correct path to the source headers.

A module for bsnmpd(1) that exports a MIB that contains information about
the local ATM interfaces and allows to change some parameters via SNMP.