newlib-cygwin/winsup/cygwin/release/3.4.0

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What's new:
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- 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:
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- 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
- The stdio input functions no longer try again to read after EOF.
This aligns Cygwin behavior to that of Linux.
Addresses: https://cygwin.com/pipermail/cygwin/2022-June/251672.html
- Treat an empty path (empty element in PATH or PATH is absent) as
the current directory as Linux does.
Addresses: https://cygwin.com/pipermail/cygwin/2022-June/251730.html
- The default values of FD_SETSIZE and NOFILE are now 1024 and 3200,
respectively.
Addresses: https://cygwin.com/pipermail/cygwin/2022-July/251839.html
Bug Fixes
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- Don't error out if getfacl(1) is called on a socket file.
Partially addresses: https://cygwin.com/pipermail/cygwin/2022-July/251768.html