Enable Authorize now (Fully automatic) button for OpenHistoricalMap endpoints

[Rub21]

Hey JOSM team,

There are some issues with logging into OpenHistoricalMap in JOSM. Currently, JOSM is hardcoded for ​https://www.openhistoricalmap.org/api, but some users have been trying to use the alternative API endpoint, ​https://api.openhistoricalmap.org/api. but it did not work, Is there a possibility to add this alternative API endpoint as well? ir order to activate the "Authorize now (Fully automatic)" button for login.

issue reported: ​https://github.com/OpenHistoricalMap/issues/issues/901

I’ve been testing this the following peace of code on my local setup JOSM and works well for both ​https://www.openhistoricalmap.org/api and ​https://api.openhistoricalmap.org/api at this line:

​https://github.com/JOSM/josm/blob/master/src/org/openstreetmap/josm/data/oauth/OAuthParameters.java#L134

            case "https://www.openhistoricalmap.org/api":
            case "https://api.openhistoricalmap.org/api":
                // clientId provided by 1ec5 (Minh Nguyễn)
                clientId = "Hl5yIhFS-Egj6aY7A35ouLOuZl0EHjj8JJQQ46IO96E";
                clientSecret = null;
                break;

could be possible to add the line case "https://api.openhistoricalmap.org/api":?

[taylor.smock]

In 19253/josm:

Fix #23988: Add api.openhistoricalmap.org as a possible endpoint for OHM when getting the default client id (patch by Rub21)