Update identifiers.org URLs

[sbmlsecretary]

From Matthias:

as far as I understand identifiers.org url patterns some of the used examples in the SBML specification are incorrect. These are all annotations which have a PREFIX:SOMETHING identifier in addition to a resource.
E.g. the following is an incorrect identifier
https://identifiers.org/go/GO:0007268
and should be
https://identifiers.org/GO:0007268
instead.
Other examples are all the chebi ids such as
https://identifiers.org/chebi/CHEBI:17345
which should be
https://identifiers.org/CHEBI:17345.

identifiers.org redefined their stable identifiers around a year ago!, so the correct compact identifiers changed. I got very angry about this during COMBINE last year when I heard first about this, but is now a fact we have to life with (In my opinion you should not change url patterns, but apparently there is a whole paper about it why it is much better to have more compactness). The correct compact identifiers which should be used are the shorter once.
This only affects the PREFIX:SOMETHING identifiers, other resources are still with the resource/identifier pattern, e.g.
https://identifiers.org/kegg.compound/C00035
stays the same.

We should update the specification to ensure only recommended annotations are use. The change will create a ton of problems with all tools reading annotations (basically it broke all my tools which made me quit angry), but it is the new reality now so the specification should reflect this.

Reported by: luciansmith

Original Ticket: sbml/sbml-specifications//367