Remove a bunch of unused configure tests, in particular cases where

Peter Eisentraut <peter_e@gmx.net>

Commit: cb292206c5c160cde6eb5618de64f810e62f378a
Author: Peter Eisentraut <peter_e@gmx.net>
Date: 2000-07-12T22:59:15Z
Releases: 7.1.1
Remove a bunch of unused configure tests, in particular cases where
* the result is not recorded anywhere
* the result is not used anywhere
* the result is only used in some places, whereas others have been getting away with it
* the result is used improperly

Also make command line options handling a little better (e.g., --disable-locale,
while redundant, should really still *dis*able).

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