Log Message:
Update of lang/nawk to 20030731. Cut-down version of changes since
20030321 version:

Jul 29, 2003:
        fixed (i think) the long-standing botch that included the beginning of
        line state ^ for RE's in the set of valid characters; this led to a
        variety of odd problems, including failure to properly match certain
        regular expressions in non-US locales.  thanks to ruslan for keeping
        at this one.

Jul 28, 2003:
        n-th try at getting internationalization right, with thanks to volker
        kiefel, arnold robbins and ruslan ermilov for advice, though they
        should not be blamed for the outcome.  according to posix, "." \ 
 is the
        radix character in programs and command line arguments regardless of
        the locale; otherwise, the locale should prevail for input and output
        of numbers.

        i have rescinded the attempt to use strcoll in expanding shorthands in
        regular expressions (cclenter).

Jul 4, 2003:
        fixed bug that permitted non-terminated RE, as in "awk /x".

Jun 1, 2003:
        subtle change to split: if source is empty, number of elems
        is always 0 and the array is not set.