Contradiction in runes spec?

[gmart7t2]

Are unknown odd tags ignored or forbidden? It can't be both!

I guess they aren't forbidden because "ord decode" happily decodes the runestone in these 3 txs, which each have unknown odd tags:

• e6c190a563824cebac0821fece3ea477d6d93a39095dd2b5de8379b56de6ae54
• e8d4998a4df7c64400d6c05f3caa939ed45d51a301125be1a33db584b9e0a18a
• 24a0fc977fef46fd6b7661a503a159c2d2e172d7d6905fe28676b1ac3cb30743

[raphjaph]

Yes, they aren't forbidden, just ignored.

I guess we should change the phrasing of the last sentence to ..., and should not be used. It would then conform more to the language used in RFCs. You can use odd tags but it will very likely lead to weird behaviour in the future.

[casey]

Unrecognized odd tags are ignored, but they are reserved, in the sense that future protocol upgrades may give them meaning, and so they should not be used for ad-hoc protocol extensions.

Updating the language in #3885.