[PATCH] posix: Avoid a stack overflow when glob is given many trailing slashes [BZ #30635]

[Bruno Haible]

Hi Collin,

> > * posix/glob.c (__glob): Strip trailing slashes before the recursive
> > call, so it is not called for every trailing slash in the pattern.

There is also https://sourceware.org/bugzilla/show_bug.cgi?id=33537,
which produces a similar stack overflow for many consecutive slashes,
not in trailing position.

I can't tell whether it's the same bug or a different bug. But you
may want to look at this one as well: if possible, it would be useful
to have a single fix for both, rather than two fixes in two different
places of the code.

Bruno