[Midnightbsd-cvs] src: bin/expr: Moderize the code and document it's conformance (or lack

[laffer1 at midnightbsd.org]

Log Message:
-----------
Moderize the code and document it's conformance (or lack thereof) with POSIX.

Obtained from: FreeBSD 10-CURRENT

Modified Files:
--------------
    src/bin/expr:
        expr.1 (r1.2 -> r1.3)
        (http://cvsweb.midnightbsd.org/src/bin/expr/expr.1?r1=1.2&r2=1.3)
        expr.y (r1.3 -> r1.4)
        (http://cvsweb.midnightbsd.org/src/bin/expr/expr.y?r1=1.3&r2=1.4)