LTLI statements

Here are the normative statements we agree at yesterdays call:

- "If you interpret the language tag, interpret it as RFC 4646"

- "Specifications that specify language tagging of any short should say
that the semantics and syntax or that should follow BCP 47 without
forcing implementations of the spec to verify wellformedness or validity"

- The third statement was not fully developed and agreed upon, but I
give it a try: "Non-wellformed or invalid language tags must not be
interpreted as language tags. However, an application does not need to
stop processing, but may transform them into valid tags and continue
processing."

Could you please confirm, make additional suggestions / change proposals?

Felix