Fix typo.

tatsuo-ishii · tatsuo-ishii · commit 9bf3458a957a · 2018-03-21T23:12:49.000+09:00
Patch by me.
diff --git a/doc/src/sgml/protocol.sgml b/doc/src/sgml/protocol.sgml
@@ -4630,7 +4630,7 @@ StartupMessage (F)
 </varlistentry>
 </variablelist>
 
-                In addition to the above, others parameter may be listed.
+                In addition to the above, other parameters may be listed.
                 Parameter names beginning with <literal>_pq_.</literal> are
                 reserved for use as protocol extensions, while others are
                 treated as run-time parameters to be set at backend start
