SONAME migration: from liblambda0 to liblambda1

[Jerome BENOIT <g6299304p@rezozer.net>]

Hello List:

When the SONAME increments the associated binary library package has a new name,
so the SONAME suffix has to increment as well accordingly: for a library package
lambda, the binary library package could be renamed from liblambda0 to liblambda1.
I thought that I could manage all of the change, but it appeared a last issue that
I have just noticed by installing the new package: the former binary package
liblambda0 is not discarded by the new binary package liblambda1, neither in Sid
nor at the upgrading stage with aptitude.
I guess that something is missing in `debian/control', any clue ?

Thanks in advance,
Jerome