SPDX IDs for approved licenses

I noticed in https://github.com/spdx/license-list-XML/issues/1112 a SPDX ID request for OGDL-Taiwan-1.0 and was reminded that several other licenses that we’ve approved don’t have SPDX IDs, or our materials use a slightly different identifier.

Made a start at alignment on the conforming licenses page in https://github.com/okfn/opendefinition/pull/209

There are certainly other places, but that’s the most visible one.

A strong plea for one single consistent complete set of license identifiers for data-capable licenses in regular use. R.