[Dev-luatex] Major commit today

[Taco Hoekwater]

Hans Hagen wrote:
> 
>> I have fixed some bugs today, and I have reverted back to strict
>> Unicode (2^20+2^16 possible characters instead of 2^21) because
>> in the current layout, that saves near 300Mb in virtual memory size.
>>   
> whow, reminds me of former omega days ...

The executable is still around 480Mb in virtual size even with
this change :-)

>> Eventually, the affected arrays will become lua hashes, and we can
>> safely go back to 2^21 then.
>>   
> 
> good

Bugs first, speedups later.

Taco