Log Message:
Update of nawk to 20040207. Changes since previous version from bwk:

        Fixed a bug in regular expressions that dates (so help me) from 1977;
        it's been there from the beginning.  an anchored longest match that
        was longer than the number of states triggered a failure to initialize
        the machine properly.  many thanks to moinak ghosh for not only finding
        this one but for providing a fix, in some of the most mysterious
        code known to man.

        fixed a storage leak in call() that appears to have been there since
        1983 or so -- a function without an explicit return that assigns a
        string to a parameter leaked a Cell.  thanks to moinak ghosh for
        spotting this very subtle one.