Some t64 libraries already in testing; I'm confused

[Julian Gilbey <julian@d-and-j.net>]

My very limited understanding of this major transition was that the
t64 libraries are being held in unstable until (almost) everything is
ready, at which point there will be a coordinated migration into
testing.  But I've now been asked to upgrade something on my testing
machine which pulls in a t64 library.  Has something slipped through
the net, or is this intentional?

Looking through testing, I see the following t64 libraries present:

libaio1t64
libfyba0t64
libglibmm-2.68-1t64
libnetcdf19t64
libudns0t64
libczmq4t64 (virtual package; libczmq4 provides this)

Best wishes,

   Julian