refactor: backport bitcoin#24356, extend `-socketevents` to `Sock`, implement `Sock::WaitMany`{`Epoll`, `KQueue`} #6018

Draft

kwvg wants to merge 8 commits intodashpay:developfrom kwvg:net_processing_6

+481-436

Commits on Sep 26, 2024

refactor: make Sock aware of event mode and applicable file descriptor
kwvg
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net: make Sock::Wait() subject to selection by -socketevents
kwvg
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refactor: clean up SocketWait{Epoll, Kqueue} logic
kwvg
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merge bitcoin#24356 : replace CConnman::SocketEvents() with mockable Sock::WaitMany()

kwvg
and
UdjinM6
committed
net: implement WaitMany variants for {epoll, kqueue}

kwvg
and
UdjinM6
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net: implement ToggleWakeupPipe in all WaitMany variants
kwvg
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trivial: cleanup unused CConnman::SocketEvents variants
kwvg
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refactor: move DEFAULT_SOCKETEVENTS to util/sock.h
kwvg
committed