Improve monitoring configuration of snmp-devices by better integration of SNMP-MIBs:

• a installed SNMP-MIB should be selectable while creating/configuring a item
• a SNMP/MIB browser should ease the selection of OIDs
  (show available names/OIDs)
• the descriptions of OIDs should displayed
• the types of the values should be automatically mapped to zabbix types
• integers which are mappable to status strings should use the definition of the SNMP-MIBs
  see also: http://www.oidview.com/mibs/789/NETWORK-APPLIANCE-MIB.html, example:

  	DESCRIPTION
  				"Clustered Failover configuration settings.
  				 The value notConfigured(1) indicates that the
  				 cluster is not licensed. The thisNodeDead(5)
  				 setting indicates that this node has been 
  				 taken over."
  	::= { cf 1 }
  
  	cfState                         OBJECT-TYPE
  	SYNTAX                          INTEGER {
                                               dead(1),
                                               canTakeover(2),
  					     cannotTakeover(3),
                                               takeover(4)
                                          }
          MAX-ACCESS                      read-only
          STATUS                          current
   

• automatic mass-creation of zabbix items would be very nice