Support custom range in time filters

[ietf-svn-bot]

owner:[email protected] type_enhancement | by [email protected]

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Suggested by Brian Carpenter

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Issue migrated from trac:2487 at 2022-03-03 10:01:06 +0000

[ietf-svn-bot]

@[email protected] changed type from defect to enhancement

[ietf-svn-bot]

@[email protected] changed status from new to accepted