Instead of listing all options with their defaults in the default
ptp4l.conf, provide a minimal ptp4l.conf intended for a client-only
operation and refer to the ptp4l man page and examples in
/usr/share/doc/linuxptp/configs.
Also, remove ntpd-specific configuration from default timemaster.conf.
The original ntpd supported by timemaster is no longer packaged in
Fedora.
