[ale] SNMP oid for file descriptors

[fassl.tod at gmail.com (Todor Fassl)]

Ultimately, what I want to do is to configure nagios to alert me when a 
server is getting low on file handles. There are a couple of scripts on 
the nagios web site but they look kind of hokey.

I think all I should have to do is cut/pasete the right SNMP object 
identifier into the nagios snmp plugin. But how to find that oid?