[RFC] new substitute path when loading feature

[Aleksandar Ristovski]

(sorry if this email is repeated, for some reason it never made it to the list)

Eli Zaretskii wrote:
> 
>> However, I'm not sure why you didn't like my original rewrite at readin... all the user would have to do for mixed path binaries is:
>>
>> set substitute-path C: /
>> (which would make iberty's IS_ABSOLUTE_PATH work on posix-ly configured gdbs)
>>
>> and this could be done by default in main :-)
> 
> I think this suggestion is so subtle that no one who has such a
> problem would ever be able to guess that substitute-path is the
> solution.

Unless it was properly documented (for example, in a section named "Debugging cross compiled binaries" or something like that).

But ok, if I'm the only one who sees rewrite at readin as a useful thing, I'll leave it alone.