[PATCH] List autoconf 2.60 bug in PROBLEMS.

[Stephen J. Turnbull]

Malcolm Purvis writes:

 > As mentioned in -beta, this adds to PROBLEMS mention of autoconf 2.60's bug
 > with `config.status --recheck'.

Unless you have a specific reason not to do so, for doc patches like
this an immediate commit would save you trouble and not pose any risks
at build or runtime.  (At least, in my experience, it saves trouble.)
AFAIK it's policy that you may feel free to propose, approve, and
commit these patches in a single post.