Build in IANA download feature

[anewton1998]

Instead of relying on a separate script on the host system to download the IANA files, it would be nice if the software just did this based on a timer.

[anewton1998]

Well... there hasn't been much movement on the bootstrap files for many years. That looks to be changing now.

[gdubin]

This is now a part of the 2.0.1 release.