sqlite now advertizes a tool that can copy sqlite3 databases even while
they're live and modified (with or without .wal files in the latest sqlite3
version)

This is a straightforward port, mainly requires grabbing the full sqlite3
src zip, and reaching out to compile only sqlite3_rsync.

Unless people want to tweak the sqlite3 port proper to artificially
enable this tool, splitting the build that way feels simpler and saner.

• sqlite3_rsync-3.50.4.tgz (1K)