- Add README file to the doc/example directory.
- Add files in doc/example for every system configuration file
  installed or modified by the RPM installation script (rpm.spec).
- Update some comments in rpm.spec.
- Some whitespace changes to doc/example/logrotate and
  packaging/RedHat/logrotate.d/distcc to make those two files match.
- Copy warning from packaging/RedHat/xinetd.d/distcc to
  doc/examples/xinetd.

Reviewers: Craig Silverstein

level.  I'm doing this in two stages, because I don't understand svn
enough to be confident to do it in one.  This first stage just copies
all the files from distcc/FOO to FOO.  Now there are two copies of
each file under distcc; the Makefile/etc uses the one in distcc and
ignores the one at the top level.

The next commit will delete everything under distcc, and rewrite the
Makefile/etc to use the top-level versions instead.