Initially I took the IRI parser from gmid, stripped of the UTF-8 things and transformed back into a URI parser. Then I've added some functions to resolve URIs, but it wasn't enough. gmid parser is aimed at servers, and so it doesn't handle very well relative links. This makes use of the libphos uri parser, which was coded to follow the RFC more strictly, and to fully support all kinds of URIs. It'll need to be expanded in the future and be improved for sure

20 is the only used, but *technically* one (read: Sean and his client torture test) can send 29, 27, ...

add an explicit port if one is given and it's not 1965

no functional changes intended

Use asr on OpenBSD to do DNS query lookups asynchronously. At the moment it seems a bit hard to provide the whole asr + asr_event stuff in the compat layer, so hide those bits behind an #ifdef; not the prettiest solution, but a working one. Future works may either: - provide a stub implementation for the asr stuff - bundle the libasr from OpenSMTD-portable