Log Message:
doc: Updated textproc/swath to 0.6.1

0.6.1 (2018-08-20)
=====
- Updated word break dictionary.
- Fix a defect in RTF parsing, so RTF gets more complete word break positions.
- Compiler warning fixes.
- Minor code cleanups.
- Useful installation instructions in INSTALL file.
  (Thanks @pepa65 for the pull request.)

0.6.0 (2017-11-28)
=====
- Updated word break dictionary.
- Drop undocumented option '-l'.
- Revamped internal word break engine.
- Updated manpage.

0.5.5 (2016-12-25)
=====
- Updated word break dictionary.

0.5.4 (2016-07-08)
=====
- Updated word break dictionary.
- Fix segfault on extremely long input lines.
- Support longer input lines.
  (Bug report by Santi Romeyen)
- Support non-ASCII word break string.
  https://github.com/tlwg/swath/issues/1
- Some source code clean-ups.
- Add test suite.

0.5.3 (2014-09-01)
=====
- Updated word break dictionary.
- Fix premature output ending on long UTF-8 input line.
  (Bug report by Sorawee Porncharoenwase)
- Fix excessive break positions in plain text mode.
  (Bug report by Sorawee Porncharoenwase)
- Remove dead codes, resulting in a little smaller binary.

0.5.2 (2013-12-23)
=====
- Fix infinite loops in LaTeX filter.
  (Bug report and patch by Neutron Soutmun)
- Fix off-by-one character loss in long HTML tokens.
  (Bug report and analysis by Nicolas Brouard)

0.5.1 (2013-10-30)
=====
- Correct word break code for Lambda.
- Updated word break dictionary.
- Adjust file filters to prevent potential buffer overflow.

0.5.0 (2013-02-11)
=====
- Character encoding conversion is now spontaneous, no more buffering via
  temporary file.
- Rewritten RTF filter. It's now tested to work with real RTF document.
- Process characters as Unicode internally, so that characters not present
  in TIS-620 are not lost in output.
- Fix potential buffer overflow vulnerability in Mule mode.
- Updated word break dictionary.
- Significant source clean-ups.
- Switch to XZ tarball compression.

For pkgsrc, use gmake and add patch to compile wchar functions on NetBSD