[Midnightbsd-cvs] src: variable.c: use setenv

[laffer1 at midnightbsd.org]

Log Message:
-----------
use setenv

Modified Files:
--------------
    src/usr.sbin/sysinstall:
        variable.c (r1.2 -> r1.3)
        (http://cvsweb.midnightbsd.org/src/usr.sbin/sysinstall/variable.c?r1=1.2&r2=1.3)