In Go 1.23, the standard maps.Keys helper was altered relative to xmaps.Keys
to return and iterator, which can be used with slices.Collect.
Also, Go 1.21 added the clear built-in, which replaces xmaps.Clear,
and is semantically more correct with respect to NaNs.
Updates #8632
Updates #12912
Updates #cleanup
Signed-off-by: Joe Tsai <joetsai@digital-static.net>
Package setting contains types for defining and representing policy settings.
It facilitates the registration of setting definitions using Register and RegisterDefinition,
and the retrieval of registered setting definitions via Definitions and DefinitionOf.
This package is intended for use primarily within the syspolicy package hierarchy,
and added in a preparation for the next PRs.
Updates #12687
Signed-off-by: Nick Khyl <nickk@tailscale.com>
