What's new:
-----------

- Drop support for Vista and Server 2008.

- Add code to handle setrlimit(RLIMIT_AS).

- Add code to handle signal masks in /proc/<PID>/status.

- Handle UDP_SEGMENT and UDP_GRO socket options.


What changed:
-------------

- The CYGWIN=pipe_byte option is now set by default, so that pipes are
  opened in byte mode rather than message mode.
  Addresses: https://cygwin.com/pipermail/cygwin/2021-March/247987.html


Bug Fixes
---------