WIP, NOTES

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+The IP-over-DNS protocol is as follows:
+
+Encoding:
+  We don't want to go outside alphanumerics and hyphens,
+  ie hostname-legal.  So we do base32 encoding:
+  8 hostname characters encoding 5 bits each, which encodes
+  5 bytes of input data.
+
+* Packets "up":
+  - client splits packet into appropriate fragments
+  - makes A queries for
+