Now checks if your auth is going to fail and aborts.

Removed timeout option.  Any timeout value can interrupt your transfer if a resumed transfer doesn't send any data for a while.
Added keepalives, to further mitigate socket timeouts.
Re-added the 'transport' option.  I don't know how well UDP will work, but SCTP works great.

Added support to limit the bandwidth (-l option)

Adds: OpenSSL encryption support, ipv6 support, transfer verification via rsync.