1905369c9f
- New STATUS_CHECK protocol status (value 6) - Client sends path + size + mtime; server replies OK (skip) or NEXT (send) - config.h/c: use_incremental field sent/received over wire - file.c/h: file_send_single_calls_no_path helper for incremental path - client_cli.c: --incremental flag - client_send.c: per-file check before send in both single and chunk paths - server.c: STATUS_CHECK handling in receive_files() - multiprocessing.c: STATUS_CHECK handling in receive_thread() - test.py: incremental sync test case