[LEAPSECS] Go API for monotonitc elapsed time measurements

[Tony Finch]

This is an interesting proposal for fixing the Cloudflare leap second bug,
so that time interval calculations do sensible things even when the clock
is reset, without making an incompatible change to the existing APIs.

https://github.com/golang/proposal/blob/master/design/12914-monotonic.md

Tony.
-- 
f.anthony.n.finch  <dot at dotat.at>  http://dotat.at/  -  I xn--zr8h punycode
Irish Sea: South 5 to 7, becoming cyclonic 6 to gale 8 for a time. Rough or
very rough, becoming moderate or rough. Rain or showers. Good, occasionally
poor.