[PATCH] config.sub is not idempotent

[John Ericson]

A canonical form is defined as one that maps to itself. I decided to 
check whether the config.sub test suite's canonical configurations 
actually did, and many of them did not, or weren't even accepted at all!

I checked this by extending the test suite with a new function, which is 
the most important part of this patch. I also hurriedly fixed config.sub 
so that it passed the improved testsuite. Those fixes however should be 
checked over as I wasn't always sure on the best way to fix things (e.g. 
what vendors to allow)

Ben, you might notice that many of these fixes overlap with my 
deduplication patch. That is because the duplication necessary 
frequently is forgotten, leading to bugs. I point this out to show how 
deduplication is not only a good idea for cleanliness, but also for 
correctness. Let's try to land this (with improve fixed) before that, 
however, as I'll be able to redo the deduplication patch with higher 
quality way once this is dealt with.

Thanks,

John

0001-config.sub-Make-idemopotent.patch
Description: Text document