fixed document type error with Estonian residence permits

[Asa-Nisi-Masa]

• fixed MRZ checker not passing for Estonian residence permits that have the document identifier 'RP', e.g. document

[Arg0s1080]

Hello friend, whats up?

Sorry, this time I cant accept your pull request.

ICAO specifications are clear:

ICAO 9303-5.

4.2.2.1 Data structure of the upper machine readable line

[...]

Document Code Two characters, the first of which shall be A, C or I, shall be used to designate the particular type of document. The second character shall be as specified in Note k.

[...]

k) The first character shall be A, C or I. Historically these three characters were chosen for their ease of recognition in the OCR-B character set. The second character shall be at the discretion of the issuing State or organization except that V shall not be used, and C shall not be used after A except in the crew member certificate.

Therefore the Estonian case is outside the norm.

I can think of two possible solutions:

1.- If you use mrz.generator you can set kwarg force=True (there are a lot of similar cases)

force (bool):  Disables checks for country, nationality and document_type fields.
               Allows to use 3-letter-codes not included in the countries dictionary
               and to use document_type codes without restrictions.

For mrz.checker there is still no solution

2.- Create a special case for Estonia that overrides document_type property

Best regards

PS: reading strictly note k there may be a case in which exists a document type"AC", so could be deleted and s != "AC" of the line code:

and C shall not be used after A except in the crew member certificate.

[Asa-Nisi-Masa]

Hello. I see, Estonian document does not comply with the standard. I will see what I can do about the special case.

[Arg0s1080]

Ok. As always.. thank you very much!

BR