doc/protocol: fix some grammar

doc/protocol.xml

@@ -59,7 +59,7 @@
       <para>
         All data between the client and the server is encoded in
         UTF-8. (Note: In UTF-8 all standard ansi characters, 0-127 are
-        the same as a standard ansi encoding.  Also, no ansi character
+        the same as in standard ansi encoding.  Also, no ansi character
         appears in any multi-byte characters.  So, you can use
         standard C functions like <function>strlen</function>, and
         <function>strcpy</function> just fine with UTF-8 encoded
@@ -1976,7 +1976,7 @@ suffix: mpc</programlisting>
       </para>
 
       <para>
-        A new messages is indicated by the <varname>message</varname>
+        New messages are indicated by the <varname>message</varname>
         idle event.
       </para>