Use the proper upper bound for genvalidity-time (#5150)
Use the proper upper bound for genvalidity-time (#5150)

fpco/stackage,massysett/stackage,clinty/stackage,mrkkrp/stackage,iand675/stackage,Daniel-Diaz/stackage,michalkonecny/stackage,jonschoning/stackage,stackbuilders/stackage,athanclark/stackage,asr/stackage,soenkehahn/stackage,simonmichael/stackage