* src/lcopy-checkout (parse_arguments): Search and prepare
  configuration file from /etc/lcopy/conf.d if user gives a
  name of non-existing file.

* src/liblcopy.sh.in (LCOPY_CONFDIR): New variable.
* src/lcopy-checkout (parse_arguments, print_usage):
  Added --list-confs option.
* src/lcopy-checkout (parse_arguments): Added
more options to command line of find when searching
configuration files in /etc/lcopy/conf.d.