Added options to support socket timestamping#504

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tglane wants to merge 2 commits intorust-lang:masterfrom

tglane:415-timestamp

Commits on Apr 18, 2024

Added support for options SO_TIMESTAMP, SO_TIMESTAMPNS and SO_TIMESTAMPING
tglane
committed

Commits on Apr 25, 2024

Refactored cfg attributes to opt-in instead of opt-out where it is appropiate
tglane
committed