feat: add securityDetails.subjectAlternativeNames() #5628

[OrKoN]

Fixes issue #5625 - Get the sanList array of the SSL Certificate

Rebased version of #5628

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[mathiasbynens]

Thanks @mtoma and thanks @OrKoN for tackling the rebase!

[mtoma]

Thanks @OrKoN for the rebase, appreciated the help.