Add warning that on Windows it only works on sockets.
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This module provides access to the function \cfunction{select()}
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available in most \UNIX{} versions. It defines the following:
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available in most operating systems. Note that on Windows, it only
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works for sockets; on other operating systems, it also works for other
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file types (in particular, on \UNIX{}, it works on pipes). It cannot
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be used or regular files to determine whether a file has grown since
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it was last read.
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The module defines the following:
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\begin{excdesc}{error}
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The exception raised when an error occurs. The accompanying value is
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