[Imports] Source tag (was: Re: NYC building + address import - to merge or not to merge?)

[Pieren]

On Tue, Oct 15, 2013 at 9:06 PM, Martin Koppenhoefer
> Pieren, not only on accounts, but on the changeset comment and tags on the
> changeset. This is common practise for some time now AFAIK.

In general, user accounts are not relyable for sourcing. Contributors
can use them for other sources. User names can be modified at any time
and their meaning lost.  Adding a link to the wiki is much better but
still not perennial as a "source" tag attached to the changeset.

Pieren