-p, not -P, for proxy tunneling

docs/FAQ

-Updated: November 14, 2001 (http://curl.haxx.se/docs/faq.shtml)
+Updated: November 20, 2001 (http://curl.haxx.se/docs/faq.shtml)
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@@ -385,7 +385,7 @@ FAQ
   etc.
 
   There is one exception to this rule, and that is if you can "tunnel through"
-  the given HTTP proxy. Proxy tunneling is enabled with a special option (-P)
+  the given HTTP proxy. Proxy tunneling is enabled with a special option (-p)
   and is generally not available as proxy admins usuable disable tunneling to
   other ports than 443 (which is used for HTTPS access through proxies).