Import wiki documentation from upstream

Imported from:

commit 2484d45a8abcb55e900de8538de6ec646992d682 (HEAD)
Author: Marvin W <git@larma.de>
Date:   Fri Aug 19 14:41:11 2022 +0200

    Destroyed _Footer (markdown)

1 files changed, 31 insertions, 0 deletions

diff --git a/doc/DEBUGGING.md b/doc/DEBUGGING.md
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+# Stack trace
+If Dino crashes, a stack trace can be obtained by executing Dino within gdb. Make sure you have debug symbols installed.
+```
+gdb dino
+> r // Starts dino
+[Do whatever makes Dino crash]
+> bt // To obtain the stack trace
+```
+To get traces of runtime criticals, use `gdb --args dino --g-fatal-warnings`.
+
+# Debug output
+Additional output will be printed when setting the environment variable `G_MESSAGES_DEBUG`. Setting it to `all` will also print output from non-Dino components (Gtk, Glib, ...).
+
+`env G_MESSAGES_DEBUG=all dino`
+
+You can filter for which components debug output should be printed by replacing `all` with `libdino` and/or `OMEMO`
+
+`env G_MESSAGES_DEBUG=libdino,OMEMO dino`
+
+
+# View XML stanzas
+Starting `dino` with `--print-xmpp=[filter]` results in stanzas being printed to stdout. You can create complex filters to specify which stanzas should be printed.
+
+|`--print-xmpp=`                | Result      |
+|------------------------------ | ----------- |
+| `all`                         | All stanzas |
+| `message`                     | Message stanzas |
+| `message.body`                | Message stanzas with a `body` child node |
+| `message[to=jid@example.com]` | Message stanzas with the `to` attribute set to `jid@example.com` |
+| `presence.{jabber:x:signed}:x` | Presence stanzas having a child node `x` with namespace `jabber:x:signed`|
+| `message\|iq`                  | Message and Iq stanzas |