ioc/db menu fixes

* Move including menuScan.dbd from menuGlobal.dbd to base.dbd.
  Menus included in menuGlobal.dbd can't be overridden at build
  time since it gets fully expanded before installation.
* Convert .dbd.pod files before generating menuGlobal.dbd.d
* Remove menuCompress.dbd, nothing in Base uses it any more.
  The compress record has its own compressALG menu

src/std/softIoc/base.dbd

@@ -1,11 +1,14 @@
 # $Revision-Id$
 #
-# This file defines the standard record types and device support
+# This file includes the standard record types and device support
 # provided by Base and (usually) loaded into all IOCs.
 
-# Menus
+# Fixed menus
 include "menuGlobal.dbd"
+
+# Modifyable menus
 include "menuConvert.dbd"
+include "menuScan.dbd"
 
 # Record types
 include "stdRecords.dbd"
@@ -13,7 +16,7 @@ include "stdRecords.dbd"
 # Channel filters & plugins
 include "filters.dbd"
 
-# "Soft Channel", "Raw Soft Channel", and "Async Soft Channel" device support
+# Standard device support
 include "devSoft.dbd"
 
 # Access security subroutines