Config.URLs Structure Type

[ptth404]

Currently Config.URLs is represented as a map.

For what I found looks like starting from Go 1.12 it really guarantee a stable iteration order over map keys. Which only means the iteration order would be the same among any other iteration.

But I didn't find any confirmation that the iteration order really preserve the order keys were defined on creation or added after.

As a hash map I believe the order might even depend on a keys number in it.

From the other hand the order of [url ] sections in a config are critically matters for the way rules would be matched/applied during resolution.

So is it really the right structure for URLs?

Related #863

[ptth404]

github.com/wk8/go-ordered-map

Same as regular maps, but also remembers the order in which keys were inserted

This implementation probably confirms standard map doesn't preserve the keys order.