doc: FreeBSD uses camcontrol identify, not atacontrol, for cache

This is for IDE drive cache control, same as SCSI (already documented
properly).

Reported-by: John Ekins

Discussion: https://postgr.es/m/20170808224017.8424.69170@wrigleys.postgresql.org

Author: John Ekins

Backpatch-through: 12

doc/src/sgml/wal.sgml

@@ -85,7 +85,7 @@
     <listitem>
       <para>
         On <productname>FreeBSD</productname>, IDE drives can be queried using
-        <command>atacontrol</command> and write caching turned off using
+        <command>camcontrol identify</command> and write caching turned off using
         <literal>hw.ata.wc=0</literal> in <filename>/boot/loader.conf</filename>;
         SCSI drives can be queried using <command>camcontrol identify</command>,
         and the write cache both queried and changed using

src/test/regress/expected/opr_sanity.out

@@ -1887,7 +1887,7 @@ WHERE p1.oid = a1.amhandler AND a1.amtype = 'i' AND
 -- Check for table amhandler functions with the wrong signature
 SELECT a1.oid, a1.amname, p1.oid, p1.proname
 FROM pg_am AS a1, pg_proc AS p1
-WHERE p1.oid = a1.amhandler AND a1.amtype = 's' AND
+WHERE p1.oid = a1.amhandler AND a1.amtype = 't' AND
     (p1.prorettype != 'table_am_handler'::regtype
      OR p1.proretset
      OR p1.pronargs != 1

src/test/regress/sql/opr_sanity.sql

@@ -1195,7 +1195,7 @@ WHERE p1.oid = a1.amhandler AND a1.amtype = 'i' AND
 
 SELECT a1.oid, a1.amname, p1.oid, p1.proname
 FROM pg_am AS a1, pg_proc AS p1
-WHERE p1.oid = a1.amhandler AND a1.amtype = 's' AND
+WHERE p1.oid = a1.amhandler AND a1.amtype = 't' AND
     (p1.prorettype != 'table_am_handler'::regtype
      OR p1.proretset
      OR p1.pronargs != 1