versionCode 3. Drop --mkpath so remotes with an rsync older than 3.2.3
(stock macOS included) can receive syncs; rsync still creates the final
remote path component on its own. NDK host toolchain detection so the
native build also runs on macOS hosts.

versionCode 2. Empty-path and config-corruption fixes, rsync process
cleanup on stopped syncs, keygen error reporting, and the store icon.

The app ships only an adaptive vector launcher icon, which F-Droid
cannot render, so the store listing showed no icon. Ship a 512x512
raster of the same mark where F-Droid looks for it (fastlane images/
icon.png).

A small Android app for one-way folder backup, a KISS alternative to
Syncthing. It bundles rsync (built from pinned source via the NDK) and
a pure-Go SSH transport, both shipped in the APK as lib*.so and run from
the native library directory.

rsend pins the host key, stores the ed25519 identity Keystore-encrypted,
pushes each folder additively or as a mirror, and runs on demand or on a
WiFi-only schedule. The build is self-contained and reproducible: make
setup provisions the toolchain, make builds rsync, rsh, and the APK.