[tex-hyphen] Add \{left,right}hyphenmin info to pattern files

[Werner LEMBERG]

>> [...]  I thus suggest to add to all hyphenation pattern files in
>> the `tex-hyphen' repository two lines to the header comments:
>>
>>   % \lefthyphenmin=X
>>   % \righthyphenmin=Y
>>
>> (with proper values for `X' and `Y').
> 
> This is in fact on immediate agenda, see
>     https://github.com/hyphenation/tex-hyphen/pull/1/files

Excellent!  Note that I've just changed the building process for the
German pattern files in our git repository so that this information
gets included automatically.


    Werner