briar/README: fix formatting, further reading FAQ draft

.gitmodules

@@ -43,3 +43,6 @@
 [submodule "LaTeX/european-union-flags"]
 	path = LaTeX/european-union-flags
 	url = https://gitea.blesmrt.net/Mikaela/eu-lippuprojekti.git
+[submodule "briar/briar.wiki"]
+	path = briar/briar.wiki
+	url = https://code.briarproject.org/briar/briar.wiki.git

briar/README.md

@@ -93,4 +93,5 @@ add new users)</s> or blogs.
   - > No, your online status isn't exposed by publishing your `briar://` link. Only your contacts can tell whether you're online.
   - > No. Unlike with adding contacts at a distance and its 48 hours timeout, there's no such thing for introductions.
 - https://code.briarproject.org/briar/briar-desktop/-/wikis/Changelog
-  - > \[0.2.0-beta 2022-02-22\] Synchronize messages via local LAN
+  - > `[0.2.0-beta 2022-02-22]` Synchronize messages via local LAN
+- [#2081: Add to FAQ most frequent reasons why Briar fails to connect to a contact](https://code.briarproject.org/briar/briar/-/issues/2081)

briar/briar.wiki

@@ -0,0 +1 @@
+Subproject commit ae278862e57031b0a1df577c5f2207f599daba3e