filter file, while still dumping the .cvsignore file from -C.

the name "/." (as it was of old) so that there is a filename for us
to send.  Fixes a problem with --delete --relative when copying from
the root (/) of the filesystem.

out by Ilja van Sprundel.

doesn't complain about our Makefile.in.

any file that is being hard-linked.

any up-to-date file (non-dir).

receiving files.

options and improved them a little.

  global.
- Added a "restart" arg to log_init() that lets us request that logging
  be reinitialized if the log-file/syslog-facility params changed.

error checking a little more.

everything that is inside that dir.

rprintf() calls (the first of which just outputs an empty line).

- rwrite() no longer supports newlines at the start of the string.
- maybe_log_item() avoids outputting a non-significant update to
  the log file if the log-file-format doesn't include %i.