Fix typo.

tatsuo-ishii · tatsuo-ishii · commit 31c869ef1a7c · 2018-03-21T23:20:10.000+09:00
Patch by me.
diff --git a/doc/src/sgml/protocol.sgml b/doc/src/sgml/protocol.sgml
@@ -5628,7 +5628,7 @@ 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
