TCP_NOTSENT_LOWAT comment update

Author: devnexen

reference/sockets/functions/socket-get-option.xml

@@ -554,7 +554,7 @@
          <row>
           <entry><constant>TCP_NOTSENT_LOWAT</constant></entry>
           <entry>
-           Sets how much unsent data by the socket stream. (Linux only)
+           Sets the limit number of unsent data in write queue by the socket stream. (Linux only)
           </entry>
           <entry>
            <type>int</type>