[Reviewer: Andy] Call Diversion AS

Alex,

Please can you review my enhancements to the snmp handler to support the Call Diversion AS?  I've live-tested.

Thanks,

Matt
Wildcard dependencies... sad face.

Can't we have have a `COMMON_DEPS` and depend on that along with the module-specific files.  Added bonus, we can then use `$<` in the build command to specify the input files automatically.