K 10
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V 3
imp
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V 27
2017-10-16T03:59:11.949629Z
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V 213
Unify boot1 with loader

Refactor boot1 to use the same I/O code as /boot/loader uses. Refactor
to use the common efi_main.c.

Submitted by: Eric McCorkle
Differential Revision: https://reviews.freebsd.org/D10447

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