[patch] add an option to info not to be smart searching nodes

[Patrice Dumas]

Hello,

Here is an option added to info to avoid being smart when searching for 
nodes. I don't think that there are any flaw with the search in info, on
the contrary, it is too efficient, and then it is hard to know if the node
location information in info files is bogus... makeinfo in C is pretty
buggy, for example, but it cannot be seen since info is so forgiving.

In my opinion, this option --strict-node-count is not really useful 
for anything else than debugging (info documents, and maybe the info
reader). Therefore I didn't document it. How should it be documented?
In --help? In doc/info-stnd.texi? Nowhere?

--
Pat

strict-node-location-switch.patch
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