Change: Move smtpserver setting for cf_execd to def

mailto and mailfrom are already in def. It makes sense to keep the
smtpserver with them. This is intended to make policy framework upgrades
slightly easier.
Merge pull request #349 from nickanderson/move_smtpserver

Change: Move smtpserver setting for cf_execd to def
Simplify script - no change in functionality.
Merge pull request #351 from jimis/tarball

Simplify script - no change in functionality.
Fix script exiting with error when NO_CONFIGURE was set.
Merge pull request #352 from jimis/tarball

Fix script exiting with error when NO_CONFIGURE was set.