x509: fix handling of multiple URIs in Certificate#crl_uris #1147

Job	Run time
openssl-1.0.2u	2m 28s
openssl-1.1.0l	1m 29s
openssl-1.1.1w	1m 44s
openssl-3.0.13	2m 52s
openssl-3.1.5	2m 48s
openssl-3.2.1	3m 16s
openssl-3.3.0	3m 13s
libressl-3.1.5	2m 6s
libressl-3.2.7	2m 27s
libressl-3.3.6	2m 24s
libressl-3.4.3	2m 15s
libressl-3.5.3	2m 31s
libressl-3.6.3	2m 17s
libressl-3.7.3	2m 17s
libressl-3.8.4	2m 10s
libressl-3.9.1	2m 19s
ruby-versions / Generate Ruby versions	2s
ubuntu-22.04 2.6	59s
ubuntu-22.04 2.7	58s
ubuntu-22.04 3.0	54s
ubuntu-22.04 3.1	55s
ubuntu-22.04 3.2	58s
ubuntu-22.04 3.3	48s
ubuntu-22.04 head	59s
ubuntu-22.04 truffleruby	1m 40s
ubuntu-22.04 truffleruby-head	1m 30s
ubuntu-20.04 2.6	1m 7s
ubuntu-20.04 2.7	59s
ubuntu-20.04 3.0	1m 8s
ubuntu-20.04 3.1	53s
ubuntu-20.04 3.2	59s
ubuntu-20.04 3.3	51s
ubuntu-20.04 head	52s
ubuntu-20.04 truffleruby-head	1m 29s
macos-latest 2.6	58s
macos-latest 2.7	49s
macos-latest 3.0	38s
macos-latest 3.1	40s
macos-latest 3.2	42s
macos-latest 3.3	37s
macos-latest head	35s
macos-latest truffleruby-head	54s
windows-latest 2.6	5m 39s
windows-latest 2.7	5m 12s
windows-latest 3.0	4m 44s
windows-latest 3.1	4m 47s
windows-latest 3.2	4m 44s
windows-latest 3.3	5m 27s
windows-latest ucrt	4m 25s
windows-latest mswin	2m 27s
	1h 39m 55s

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