* when a path build times out, shitlist every router in the path except the first hop, this way eventually we get the nodedb pruned to only the routers that are currently actually alive, any ones we nuke that we need later we can always do lookups for.
* include stricter router profiling checks in path::Builder hop slection algorithm
* make intro selection function nicer by returning a std::optional instead of a bool with an "out" variable
* do FEC for latency tests so if we fail one test it doesn't kill the entire path
* ignore FEC'd responses on latency tests
* track latency history and report the mean latency instead of just the last sample
Fixes a subtle memory leak that was a result of outbound messages which
were in the shared queue (not yet sorted into a per-path queue) when a
path was removed, resulting in a ghost path queue (and thus round-robin
order entry as well).
Adds much needed documentation to the outbound message handler class.
* wire up last of the quic stuff
* clean up udp packet generation code
* pass EndpointBase not quic tunnel for quic stuff
* add {n,h}uint16_t::FromString
* add nuint_t::FromString
* make AlignedBuffer::IsZero non constant time call for speed
All #ifndef guards on headers have been removed, I think,
in favor of #pragma once
Headers are now included as `#include "filename"` if the included file
resides in the same directory as the file including it, or any
subdirectory therein. Otherwise they are included as
`#include <project/top/dir/relative/path/filename>`
The above does not include system/os headers.
loop->call(...) is similar to the old logic->Call(...), but is smart
about the current thread: if called from within the event loop it simply
runs the argument directly, otherwise it queues it.
Similarly most of the other event loop calls are also now thread-aware:
for example, `call_later(...)` can queue the job directly when called if
in the event loop rather than having to double-queue through the even
loop (once to call, then inside the call to initiate the time).
