Log Message:
(pkgsrc)
 - Add LICENSE= x11
(upstream)
 - Update cstream 2.7.5 to 3.1.1
3.1.1:
-----
  -n <nbytes_to_stream> was not clear to use numbers > 2 GB.  I didn't
  notice since it worked fine if you used suffixes "K/M/G" as long as
  the number was < 2 G.  Sorry about that.

3.1.0:
------
  O_DIRECT supported for input.

3.0.0:
------
  IPV6 support for IPV6 day 2011.

  The IPV6 support shouldn't break anything after hostname lookup
  succeeds.  Issues might be building on older platforms if I screwed up
  the autoconf mechanism to not compile it in.

  Having said that, assorted little code cleanups are in this release,
  too.  They shouldn't break anything but non-IPV6 things were touched.

Aftermath for 2.7.4 - 2.7.6:
----------------------------
  ATTENTION:
  I'm afraid that support for the '-B <size_of_buffer>' was clobbered in
  2.7.4 or whereabouts.  This one allowed you do have a reader do
  multiple reads before the writer could write or vice versa.

  Change reverted in 2.7.6.

  2.7.4 and 2.7.5 do not have working -B.

2.8.0:
------
  Support platforms that do not have open(2) with O_DIRECT.
  Such as MacOS X.

2.7.6:
------
  Revert 2.7.3 which broke -B