newlib-cygwin/winsup/cygwin/release/1.7.17

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What's new:
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- Support the "e" flag to fopen(3). This is a Glibc extension which
allows to fopen the file with the O_CLOEXEC flag set.
- Support the "x" flag to fopen(3). This is a Glibc/C11 extension which
allows to open the file with the O_EXCL flag set.
Bug fixes:
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- Prevent CTRL-S hang.
Fixes: http://cygwin.com/ml/cygwin/2012-10/threads.html#00089
- Revamp signals so that signals-to-threads more closely mimic Linux
operation.
First step of fix for: http://cygwin.com/ml/cygwin/2012-05/msg00186.html
as well as observed Linux behavior.
- Revert to only creating a new session leader when we know that a
console process is started in the background.
Should fix: http://cygwin.com/ml/cygwin/2012-08/threads.html#00062
- Fix mysterious crashes when accessing /etc.
Fixes: http://cygwin.com/ml/cygwin/2012-07/threads.html#00613 and others.
- Fix a potential race condition starting multiple "first" Cygwin processes
concurrently.
Should fix: http://cygwin.com/ml/cygwin/2012-07/msg00531.html
- Fix a bug in unlink/rmdir which could result in removing non-empty
directories on network drives. Also fix problems trying to rename files
under newer Samba versions.
Fixes: http://cygwin.com/ml/cygwin/2012-07/threads.html#00477
- Prefer to call WSARecvMsg from recvmsg if possible.
Fixes: http://cygwin.com/ml/cygwin/2012-07/msg00662.html
- Correct hang typified by running "procps" after Cygwin has started a
Windows process.
Fixes: http://cygwin.com/ml/cygwin/2012-05/threads.html#00349