newlib/winsup/cygwin/release/1.7.18

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What's new:
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- For performance reasons, Cygwin does not try to create sparse files
automatically anymore, unless you use the new "sparse" mount option.
- Added Windows console cursor appearance support:
- Show/Hide Cursor mode (DECTCEM): "ESC[?25h" / "ESC[?25l"
- Set cursor style (DECSCUSR): "ESC[n q" (note the space before the q);
where n is 0, 1, 2 for block cursor, 3, 4 for underline cursor (all
disregarding blinking mode), or > 4 to set the cursor height to a
percentage of the cell height.
- New API: cfsetspeed.
Bug fixes:
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- Fix handle leak in rewinddir(3). This affected Windows 2000 only.
- Allow quoted filenames in @ argument expression when called from native
processes. Fixes http://cygwin.com/ml/cygwin/2012-12/msg00276.html
- Fix a bug in initializing the stdio settings at process startup, which
could result in missing output.
Fixes http://cygwin.com/ml/cygwin/2013-01/msg00008.html
- rename("dir1", "dir2") could result in deleting dir2, even if the rename
didn't take place, for instance, if dir1 and dir2 were not on the same
device.
- rename("file1", "file2") would fail in almost all cases on NFS, due to a
bug in the NFS driver's implementation of the FileRenameInformation info
class.