[Pkg-matrix-maintainers] Bug#926671: nheko: Unrecognized event id formats cause nheko to crash

[Linda Lapinlampi]

Control: tags 926671 + patch
Control: severity 926671 important

I'm attaching a DEP-3 formatted Debian patch, backported from upstream
mtxclient to nheko 0.6.3-1 in Debian.

I'm also increasing the severity of this bug to "important".  I think
it'd be best to try to get the release managers' manual approval for
unblock this change into Buster via unstable upload, since nheko in
buster/stable may not be very useful in few years without this patch or
a backport: https://github.com/matrix-org/matrix-doc/pull/1943

(uhoreg@ mentined libqmatrixclient may need this same patch too, but I
didn't look into that.)