comms/dcf77pi: update to 3.3.0

Changes:
* improve support for decoding the alarm messages by showing the main German
  regions which are affected. Note that this was an experimental and now
  unused system. With permission from Mr. Wenzelewski from DIN

* Doxygen support, provide a Doxyfile (not supported by the port yet)

* Small fixes to the FidoCADJ schematics

* library:
  - assign date/time fields more independently so that errors are corrected
    faster
  - record the accumulated minute length at the end of each line in the log
    file, preceded by an 'a'. These values are read back by get_bit_file()
  - redesign the calculations for the accumulated minute length to be more
    accurate in case of reception errors or reading log files. Time can now
    be adjust forwards and backwards.
  - record the minute cutoff value at the end of each line in the log file,
    preceded by a 'c'. These values are read back by get_bit_file()
  - skip consecutive newlines in the log file
  - use a more accurate sleep time when receiving live bits
  - set upper bound of hw.freq to 155,000 Hz
  - API cleanups (types sanitized, const qualifiers added, some renames)
  - algorithm and code cleanups

* dcf77pi:
  - show the accumulated minute length each second instead of each minute
  - show the minute cutoff value


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@375497 35697150-7ecd-e111-bb59-0022644237b5
Properly support png 1.5


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@375498 35697150-7ecd-e111-bb59-0022644237b5