K 10
svn:author
V 11
arichardson
K 8
svn:date
V 27
2020-09-23T12:54:42.456586Z
K 7
svn:log
V 244
byacc: fix UBSan signed shift range error

I've submitted this patch upstream, so apply this to contrib/ until a new
version containing this change has been released.

Reviewed By:	jkim
Differential Revision: https://reviews.freebsd.org/D26505

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