dns.mitm: allow nullptr for port string (closes #1352)

dns.mitm: fix hosts file parsing bug

dns.mitm: make line ordering explicit, rather than implicit. ...

This doesn't actually change functionality, because this is how std::unordered_map worked anyway...

...but it's better for us to be explicit, I think.

dns.mitm: add documentation

dns.mitm: support % in hosts file as stand-in for environment identifier

dns.mitm: fix ABORT_UNLESS -> ABORT

dns.mitm: hint = {} fix in options

dns.mitm: add GetAddrInfo redir, AtmosphereReloadHostsFile, debug logging control

dns.mitm: fix inverted hostname detection

dns.mitm: support wildcards in hosts

dns.mitm: edit default behavior/hosts filenames

dns.mitm: fix issue in host file parsing

dns.mitm: parse redirections from hosts file

dns: implement GetHostByName redirection (backend TODO)

dns: skeleton passthrough mitm

result: always prefer diag::Abort to fatal

dmnt: ro:dmnt available on all sysvers

sm: supercede ams extension via DetachClient

ams: communicate status to libnx

strat: update for revised libnx weak alloc funcs

boot: remove references to memalign/malloc

ams_mitm: update for new sf semantics

dmnt: update for new sf semantics

creport: update for new sf semantics

boot2: update for new sf semantics

boot: update for new sf-semantics

fatal: update screen task to use native window directly

fatal: wip (pending libnx pr) update for new sf semantics

jpegdec: note libjpeg-turbo TODO

loader: fix failure-to-early-return in launch record management