commands so that the pre-xfer command has a unique ID it can
use to cache information for the post-xfer command.

another corner case I noticed.

that were read from a per-dir merge file when --delete-excluded
is enabled.  This additional code fixes that.

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.