Log Message:
Version 4.7.7:
mirror: fixed coredump when source directory does not exist.
mirror: don't create target directory if can't enter to the source directory.
ftp: fixed a rare hang when a NOOP was sent between "transfer ok" \ 
reply and EOF on data socket.
fixed xfer:log setting (compatibility alias).
ftp: don't use EPSV with a proxy.