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adjust handling for greek characters. fixes #3188

This fixes an error in the case conversion table and removes "normal"
greek letters from the list of special characters. Mathematical symbols
based

adjust handling for greek characters. fixes #3188

This fixes an error in the case conversion table and removes "normal"
greek letters from the list of special characters. Mathematical symbols
based on greek letters are still considered special chars.

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fix the case lookup table. #3113

This readds a whole bunch of conversions that for some reason got lost
in the refactoring. No idea what happened there.

Create separate table files for UTF-8 handling

These will be loaded via include, later on and should be cachable by
Op-Cache.

The formatting has been adjusted to have one entry per line to make
dif

Create separate table files for UTF-8 handling

These will be loaded via include, later on and should be cachable by
Op-Cache.

The formatting has been adjusted to have one entry per line to make
diffing much easier in the future.

For now duplicate keys and commented code from the originals have been
kept. But this should probably be cleaned up in the future.

For now these tables are not used, yet.

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