#1 added shutdown call

[Ryan Barrett]

This patch adds a web_server_shutdown() call. It closes
the server socket and the weblog file and frees any
allocated memory. This is useful if you need to stop
and restart the web server multiple times while your
program is running.

[Ryan Barrett]

adds shutdown cal

[Ryan Barrett]

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I've posted a web page to host this patch.

http://snarfed.org/space/libwebserver+shutdown+patch