bug#7785: rgrep is broken on woe32

[Óscar Fuentes]

Sam Steingold <sds@gnu.org> writes:

[snip]

> /usr/bin/find: invalid expression; I was expecting to find a ')'
> somewhere but did not see one.
>
> Grep finished with no matches found at Tue Jan 04 18:42:28
> =======================================
>
> when I paste the above command into a cygwin shell window, it works
> just fine (finds what I need).
> i.e., the () in the command are actually well balanced.

This looks like the string length restriction in cmdproxy.exe reported
in

http://debbugs.gnu.org/cgi/bugreport.cgi?bug=6674#74

It was patched, as indicated on the subsequent messages on that thread.