* util/plugin/bgp_plugin.pl: New plugin: Connect the device via SNMP
and performs a check of each BGP connection to verify its active
status. If cannot connect or BGP has no connection or a single
connection its down, returns a CRITICAL state. It uses password to
provide SNMP community for device. It should work with SNMP v1 and v2c
git-svn-id: https://svn.code.sf.net/p/pandora/code/trunk@2693 c3f86ba8-e40f-0410-aaad-9ba5e7f4b01f
slerena