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tijl
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2016-09-25T18:29:02.919132Z
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MFamd64: r266901

Allocate a zeroed LDT.

Failing to do this might result in the LDT appearing to run out of free
descriptors because of random junk in the descriptor's 'sd_type' field.

http://lists.freebsd.org/pipermail/freebsd-amd64/2014-May/016088.html

PR:		212639
Submitted by:	wheelcomplex@gmail.com
MFC after:	2 weeks

END