Fix some typos in the documentation

Thom Brown

doc/src/sgml/ref/pg_receivexlog.sgml

@@ -254,7 +254,7 @@ PostgreSQL documentation
    <literal>mydbserver</literal> and store it in the local directory
    <filename>/usr/local/pgsql/archive</filename>:
 <screen>
-<prompt>$</prompt> <userinput>pg_receivexlog -h mydbserver -D /home/pgbackup/archive</userinput>
+<prompt>$</prompt> <userinput>pg_receivexlog -h mydbserver -D /usr/local/pgsql/archive</userinput>
 </screen></para>
  </refsect1>
 

doc/src/sgml/reference.sgml

@@ -200,7 +200,7 @@
    </para>
 
    <para>
-    When specified on the command line, user and databases names have
+    When specified on the command line, user and database names have
     their case preserved &mdash; the presence of spaces or special
     characters might require quoting.  Table names and other identifiers
     do not have their case preserved, except where documented, and