Bug#660034: transition: libvpx
this transition was started by the libvpx upload to unstable replacing
libvpx0 with libvpx1, without any coordination AFAICT:
I set up a tracker accordingly:
Since this interferes with x264, I'm taking the liberty of 0-day NMUing
it to fix #658453, so that packages involved in the x264 transition can
BinNMUs for other packages will be needed, too.
I'll fix the submitter address once I have the bug number.