adifmt fix: Primary administrative code from name

[flwyd]

adifmt fix could look up the Code for Primary_Administrative_Subdivision enum values when the input contains the value in PrimaryAdministrativeSubdivision. This is useful when logging DX contacts where the logging operator doesn't know the naming/numbering scheme for the remote country and the DX station gives the name rather than the code, e.g. "Chiba" (Japan) rather than "12". Matching should be case-insensitive and allow for presence or absence of diacritics, e.g. PrimaryAdministrativeSubdivisionQC_1 is in the spec as "Québec" but might be logged as QUEBEC.