Add irma cmd option to prolong keys #639

Job	Run time
docker-build	54s
lint	1m 10s
build (linux, amd64)	38s
test	6m 43s
build (linux, 386)	1m 8s
build (linux, arm)	33s
build (linux, arm64)	1m 1s
build (darwin, amd64)	1m 2s
build (darwin, arm64)	1m 17s
build (windows, amd64)	1m 15s
build (windows, 386)	45s
build (windows, arm)	40s
build (windows, arm64)	59s
analyze	1m 45s
integration-test-serverside (f0023141ec429d912e329665f937d05b178a3fee)	2m 47s
integration-test-clientside (v0.13.2)	2m 33s
	25m 10s

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