FIX: f5_bigip_vserver: fix wrong OID (13 instead of 1)

Conflicts:
	ChangeLog
	checks/f5_bigip_vserver
FIX: f5_bigip_psu: handle more than first power supply

Conflicts:
	checks/f5_bigip_psu
viprinet_* checks: fix SNMP scan function
mk_postgres plugin: replace select * with list of explicit columns (fix for PG 9.1)