Log Message:
Update to 0.30. Major changes:
- rewrite of large parts of code. Now use net-snmp libraries instead of
  calling an external program
- There are now a sdig(8) and sdig.conf(5) man pages
-  the debug code now has multiple levels so using -d once
   doesn't give you all the really messy unimportant stuff.  To see
   that, use several - the really ugly ones are hiding down at 5 and 6.

With some snmp fixes by myself, I can now successfully querry my 3com and
alliedtelesyn switches.