Please unblock package waypipe.


[ Reason ]
Waypipe versions prior to 0.8.6 contain a memory leak that is documented
as bug #1034163 [1]. I have cherry-picked a one-line fix from upstream
[2], and have verified that it fixes the problem. I have uploaded
0.8.4-3 to unstable with that patch as the only change. A debdiff
against 0.8.4-2 (in testing) is attached.

[ Impact ]
If the unblock isn't granted, Bookworm will ship with a version of
waypipe that leaks memory, making long-running sessions
problematic. Since waypipe's job is to provide SSH forwarding (à la "ssh
-X") to software running under Wayland, such long-running sessions are
expected.

[ Tests ]
By running waypipe in debug mode, e.g.

 waypipe -d ssh localhost weston-simple-shm  2>&1 | grep "in flight"

one can watch the "number of bytes in flight" messages report an
ever-increasing number of bytes in the version of waypipe in Bookworm
(0.8.4-2). With the fixed version from unstable (0.8.4-3), the number
of bytes in flight remains bounded.

This test was recommended to me by waypipe's upstream author.

[ Risks ]
The fix is a one-line patch, authored by upstream and already released
as part of upstream's version 0.8.6.

[ Checklist ]
  [X] all changes are documented in the d/changelog
  [X] I reviewed all changes and I approve them
  [X] attach debdiff against the package in testing


[1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1034163

[2] https://gitlab.freedesktop.org/mstoeckl/waypipe/-/commit/9070c4c527c906cb186588ca410d92d2f7f3c7ba


unblock waypipe/0.8.4-3

Unblocked.