RFE: Please change the order of scanning

[H. Peter Anvin]

Right now, when connecting to a remote host for download, using rsync 
protocol, it happens in the following order:

1. The connection is made
2. The remote file tree is scanned
3. The local file tree is scanned
4. Files are downloaded

Unfortunately, especially when using --checksum (because of local data 
corruption or what not), step 3 can easily take long enough that the 
remote host times out and closes the connection, since there is no 
traffic during that time.

This really should be:

3. The local file tree is scanned
1. The connection is made
2. The remote file tree is scanned
4. Files are downloaded

If not, then there needs to be some kind of keepalives sent during step 3.

	-hpa