MFC r271664:   Cache GELI passphrases entered at the console during the boot process,   in order to improve user-friendliness when a system has multiple disks   encrypted using the same passphrase.
MFC r271664:
  Cache GELI passphrases entered at the console during the boot process,
  in order to improve user-friendliness when a system has multiple disks
  encrypted using the same passphrase.

Relnotes:	yes
Approved by:	re (gjb)

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