Fix typo spotted by Fredrik Lundh.

Doc/lib/libsocket.tex

@@ -529,7 +529,7 @@ socket operations are disabled.
 \end{methoddesc}
 
 Some notes on the interaction between socket blocking and timeouts:
-socket blocking mode takes precendence over timeouts. If a socket if
+socket blocking mode takes precedence over timeouts. If a socket if
 set to non-blocking mode, then timeouts set on sockets are not used.
 The timeout value associated with the socket can still be set using
 \method{settimeout()} and its value retrieved using