AK/Random is already the same as SecureRandom. See PR for more details.
ProcessPrng is used on Windows for compatibility w/ sandboxing measures
See e.g. https://crbug.com/40277768
This commit changes the event loop to use IOCPs instead of
WaitForMultipleObjects to wait on events. This is done through the Nt
kernel api NtAssociateWaitCompletionPacket which associates an event
with a completion packet. Each completion packet notifies only once, as
they are normally used to signal completion of an operation so to use
them for notifiers they are associated again after each time they are
triggered.
There are more optimizations that can be done, such as reusing the
EventLoopNotifier and EventLoopTimer structures to reduce the number of
allocations and context switches for timer and notifier registration.
When shutting down helper processes, PosixSocketHelper::close() in
SocketWindows when trying to close the socket fd with
WSANOTINITIALISED. This was due to us initiating WinSock2 during static
initialization and presumably also not terminating WinSock2 properly.
Similar to WinSock2 initiation, calling CRT during static
initialization is considered dangerous given the CRT DLL itself may not
yet be initialized.
Because of the above, we move to perform this Windows-specific
runtime setup/teardown calls into the main() functions.
