MFC r292500,r292501,r292504,r292509:

r292500:

Simplify Kyuafile generation logic with KYUAFILE == auto and
related complexity with variables

Differential Revision: https://reviews.freebsd.org/D4406 (part of a larger diff)
Reviewed by: emaste, Evan Cramer <eccramer@gmail.com>
Sponsored by: EMC / Isilon Storage Division

r292501:

Fix typo in r292500 by adding missing conditional statement

Pointyhat to: ngie
Differential Revision: https://reviews.freebsd.org/D4406 (part of a larger diff)
Sponsored by: EMC / Isilon Storage Division

r292504:

Deal with another hardcoded reference to Kyuafile in the KYUAFILE == auto
case

Differential Revision: https://reviews.freebsd.org/D4406 (part of a larger diff)
Reviewed by: emaste, Evan Cramer <eccramer@gmail.com>
Sponsored by: EMC / Isilon Storage Division

r292509:

Clean up Kyuafile.tmp, not Kyuafile.auto.tmp

Differential Revision: https://reviews.freebsd.org/D4406 (part of a larger diff)
Reviewed by: emaste, Evan Cramer <eccramer@gmail.com>
Sponsored by: EMC / Isilon Storage Division