* Took an initial whack at encouraging internet-based discovery of open peers.
* Added settings to control whether replication, room, peer exchange, and account registration are allowed.
* Implemented prompt() on Android.
* Fixed some incorrect cross-thread use of the main JS context.
* Fixed yet another incorrect use of the DB from the main thread, from an RPC that isn't ever hit.  Hmm.
* Minor admin layout fixes.
* Added c-ares for TXT record lookups.
* Latest libsodium-stable.
* Latest libbacktrace.
* Latest CodeMirror.
* Updated to Lit 3.2.0.
* Updated sqlite to 3.46.1.
