update manual

shadowsocks.8

@@ -78,8 +78,8 @@ Set the socket timeout in secondes. The default value is 10.
 .B \-c \fIconfig_file\fP
 Use a configuration file.
 
-.SH EXAMPLES
-The \*(Re needs to be used with the NAT function. Here are some examples:
+.SH EXAMPLE
+\*(Re needs to be used with the NAT function. Here is an example:
 
     # Create new chain
     root@Wrt:~# iptables -t nat -N SHADOWSOCKS