newlib/winsup/cygwin/release/2.0.0

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What's new:
-----------
- basename(3) now comes in two flavors, POSIX and GNU. The POSIX version is
the default. You get the GNU version after
#define _GNU_SOURCE
#include <string.h>
What changed:
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- The maximum number of PTYs has been raised from 64 to 128.
Bug Fixes
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- Fix potential hang in pseudo ttys when generating ECHO output while the slave
is flooding the pty with output.
Addresses: https://cygwin.com/ml/cygwin/2015-03/msg00019.html
- Fix potential premature SIGHUP in pty code.
Addresses: https://cygwin.com/ml/cygwin/2015-03/msg00070.html
- Fix a name change from symlink to target name in calls to execvp, system, etc.
Addresses: https://cygwin.com/ml/cygwin/2015-03/msg00270.html
- Fix internal error in pty -ONLCR handling. Fix timing bug in pty OPOST
handling.
Addresses: https://cygwin.com/ml/cygwin/2015-02/msg00929.html
- Avoid creating passwd and group records from fully qualified Windows
account names (domain\name, name@domain).
Addresses: https://cygwin.com/ml/cygwin/2015-03/msg00528.html
- Avoid potential crash at startup or in getgroups(2).
Addresses: https://cygwin.com/ml/cygwin/2015-04/msg00010.html
- Fix UTF-16 surrogate handling in wctomb and friends.
Addresses: https://cygwin.com/ml/cygwin/2015-03/msg00452.html
- Fix shmget usage of size parameter for already existing segments.
Addresses: https://cygwin.com/ml/cygwin/2015-04/msg00105.html
- Fix how in-use files on virtual drives created via subst are moved to
the recycler in unlink(2).
Addresses: https://cygwin.com/ml/cygwin/2015-04/msg00527.html
- Fix how in-use files on Samba drives are renamed in unlink(2).