[issue18807] Allow venv to create copies, even when symlinks are supported

[Barry A. Warsaw]

Barry A. Warsaw added the comment:

The os.chmod() will fail if path is a symlink.  At the very least it must be guarded by a `not os.path.islink()` call like above it.  I'll add this check to 3.4 and 3.5.

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nosy: +barry

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18807>
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