[HECnet] More HECnet cisco reconfig...

[Brian Hechinger]

There are some of you who may have noticed the tunnel system trying to update my tunnel with a source IP of nothing.

I've fixed the script which populates the db with my home IP address so that will not happen again.

I also added data sanity checking code to the tunnel config system to better deal with this sort of thing in the future. A blank IP would actually cause the pySNMP module to explode into flames and bring the entire thing down. :)

-brian