Update to new naming of ZConfig schema components.

src/ZODB/config.xml

-<schema type="database">
+<schema type="database" prefix="ZODB.config">
 
-  <sectiongroup type="storage">
+  <abstracttype name="storage"/>
 
-    <sectiontype type="filestorage" datatype="ZODB.config.FileStorage">
+  <sectiontype name="filestorage" datatype=".FileStorage"
+               implements="storage">
     <key name="path" required="yes"/>
     <key name="create" datatype="boolean" default="true"/>
     <key name="read_only" datatype="boolean" default="false"/>
@@ -10,11 +11,13 @@
     <key name="quota" datatype="integer"/>
   </sectiontype>
 
-    <sectiontype type="mappingstorage" datatype="ZODB.config.MappingStorage">
+  <sectiontype name="mappingstorage" datatype=".MappingStorage"
+               implements="storage">
     <key name="name" default="Mapping Storage"/>
   </sectiontype>
 
-    <sectiontype type="fullstorage" datatype="ZODB.config.BDBStorage">
+  <sectiontype name="fullstorage" datatype=".BDBStorage"
+               implements="storage">
     <key name="name" required="yes" />
     <key name="interval" datatype="time-interval" default="2m" />
     <key name="kbyte" datatype="integer" default="0" />
@@ -29,7 +32,8 @@
 
   <!-- XXX Fred promises to make it so minimal storage is just an
        extension of fullstorage -->
-    <sectiontype type="minimalstorage" datatype="ZODB.config.BDBStorage">
+  <sectiontype name="minimalstorage" datatype=".BDBStorage"
+               implements="storage">
     <key name="name" required="yes" />
     <key name="interval" datatype="time-interval" default="2m" />
     <key name="kbyte" datatype="integer" default="0" />
@@ -42,7 +46,8 @@
     <key name="read_only" datatype="boolean" default="off"/>
   </sectiontype>
 
-    <sectiontype type="zeoclient" datatype="ZODB.config.ZEOClient">
+  <sectiontype name="zeoclient" datatype=".ZEOClient"
+               implements="storage">
     <multikey name="server" datatype="socket-address" required="yes"/>
     <key name="storage" default="1"/>
     <key name="cache_size" datatype="integer" default="20000000"/>
@@ -56,13 +61,13 @@
     <key name="read_only_fallback" datatype="boolean" default="off"/>
   </sectiontype>
 
-    <sectiontype type="demostorage" datatype="ZODB.config.DemoStorage">
+  <sectiontype name="demostorage" datatype=".DemoStorage"
+               implements="storage">
     <key name="name" default="Demo Storage"/>
     <section type="storage" name="*" attribute="base"/>
     <key name="quota" datatype="integer"/>
   </sectiontype>
 
-  </sectiongroup>
 
   <!-- the rest is the actual configuration for the database -->
   <section type="storage" name="*" attribute="storage"/>