fixes https://github.com/spesmilo/electrum/issues/8011
> Upgraded from Appimage 4.1.5 to 4.3.2 on MX-Linux 19.
> The new version fails to start with:
>
> ```
> $ electrum
> qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
> This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may > fix this problem.
>
> Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, webgl, xcb.
>
> Aborted (core dumped)
> ```
debian 10 only distributes libxcb-util0.
debian 11 distributes libxcb-util1.
our base image atm is debian 10, so we build the package from source.
```
Traceback (most recent call last):
File "kivy/_clock.pyx", line 645, in kivy._clock.CyClockBase._process_events
File "kivy/_clock.pyx", line 218, in kivy._clock.ClockEvent.tick
File "/home/user/wspace/electrum/.buildozer_kivy/android/app/electrum/gui/kivy/uix/dialogs/password_dialog.py", line 227, in <lambda>
File "/home/user/wspace/electrum/.buildozer_kivy/android/app/electrum/gui/kivy/uix/dialogs/password_dialog.py", line 333, in <lambda>
File "/home/user/wspace/electrum/.buildozer_kivy/android/app/electrum/gui/kivy/main_window.py", line 721, in on_open_wallet
File "/home/user/wspace/electrum/.buildozer_kivy/android/app/electrum/gui/kivy/main_window.py", line 687, in on_wizard_success
File "/home/user/wspace/electrum/.buildozer_kivy/android/app/electrum/util.py", line 445, in <lambda>
File "/home/user/wspace/electrum/.buildozer_kivy/android/app/electrum/util.py", line 441, in do_profile
File "/home/user/wspace/electrum/.buildozer_kivy/android/app/electrum/gui/kivy/main_window.py", line 940, in load_wallet
File "/home/user/wspace/electrum/.buildozer_kivy/android/app/electrum/gui/kivy/main_window.py", line 950, in request_focus_for_main_view
File "jnius/jnius_export_class.pxi", line 844, in jnius.jnius.JavaMethod.__call__
jnius.jnius.JavaException: Cannot call instance method b'requestFocusForMainView' on class b'org/kivy/android/PythonActivity'
```
If enabled, we log to stderr, which can get inspected via logcat.
Not user-friendly at all - but previously there was no way to get logs from a release build.
closes https://github.com/spesmilo/electrum/issues/7409
If the short_channel_id of a channel update received
with update_fail_htlc does not match the channel in
our route, blacklist the channel in our route.
SomberNight
Sander van Grieken
ThomasV