fix handling of gopher selectors Much of telescope works in terms of URI, so we convert each gopher link to an URI. However, we didn't urlencode the path parameter, thus failing on every link that contains spaces or similar invalid (in URI paths) characters. Issue reported by hryjksn on github, thanks! https://github.com/omar-polo/telescope/issues/14

iri: add iri_setport() takes a string because the internals of telescope makes it easier to use if a string.

iri: support framents and enable fragments tests

draft of the new iri parser for the moment is just a URI (RFC3986) parser, and not even a complete one, but I like it much more than phos_uri. It's more gentle in the memory consumption and has a cleaner API. It's not complete, some parts are still stubbed or completely to implement, but it's the start. It compiles. Step-by-step integration of it in telescope and testing will come later.