the go tool currenty has a pathology where it mistakingly claims it
can't clone a repo because it checks prefix by bytes, not by splitting
the path on slash.
Once https://github.com/golang/go/issues/15947 comes out (go1.8) then go
tools will be able to handle being provided with valid but overlapping
packages.
For now though we'll just return meta for the requested package.
Change-Id: Ie5026e7d5c1377ff7d2c2140b21f9b745af69764
No longer do we keep track of const iota style. Just encode the behavior
in the server for defaults, add a validation function, call it a day.
Change-Id: I603e9dd287a57084c78c543f1ce83b0acf47a765
