Merge: r272769

Import byacc 20141006

PR: 193499

Merge: 272655

Import byacc 20141005 from vendor

Merge: r268811

Update to byacc 20140715

PR: 191020
Submitted by: gcooper (yaneurabeya@gmail.com)

MFC: r257315, r260445, r264803

Update byacc to 20140422

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Update byacc to 20130304

update to version 20120526

Import byacc from invisible island, it brings us lots of compatibilities with
bison, keeping full compatibility with our previous yacc implementation.

Also bring the ability to create reentrant parser

This fix bin/140309 [1]

PR: bin/140309 [1]
Submitted by: Philippe Pepiot <ksh@philpep.org> [1]
Approved by: des (mentor)
MFC after: 1 month

Import byacc 20120115

Approved by: des (mentor)