Check in stuff mistakenly committed from the Zope trunk.

Rev 26842 changed cache-size parameters to type byte-size.
That's a good change, but it was checked in from a wrong place
(from the Zope trunk's copy of ZODB).  Since we want Zope 2.8 to
be usable with ZODB 3.3 too, I need to slam this change into
3.3 now.

Alas, I don't understand how ZODB+ZEO got stitched into the
Zope trunk (I do understand how it got stitched into the
Zope3 trunk, and into the X3 branch), and it looks like that
was left in a poor state.

NEWS.txt

@@ -2,7 +2,12 @@ What's new in ZODB3 3.3?
 ========================
 Release date: 17-Sep-2004
 
-Nothing changed since the 3.3c1 release, except for adding a new test.
+ZODB/component.xml
+------------------
+
+``cache-size`` parameters were changed from type ``integer`` to
+type ``byte-size``.  This allows you to specify, for example,
+"``cache-size 20MB``" to get a 20 megabyte cache.
 
 
 What's new in ZODB3 3.3 release candidate 1?

src/ZODB/component.xml

@@ -73,9 +73,9 @@
         which is also the default name for the ZEO server.
       </description>
     </key>
-    <key name="cache-size" datatype="integer" default="20000000">
+    <key name="cache-size" datatype="byte-size" default="20MB">
       <description>
-        The maximum size of the client cache, in bytes.
+        The maximum size of the client cache, in bytes, KB or MB.
       </description>
     </key>
     <key name="name" default="">
@@ -152,7 +152,7 @@
   <sectiontype name="zodb" datatype=".ZODBDatabase"
                implements="ZODB.database">
     <section type="ZODB.storage" name="*" attribute="storage"/>
-    <key name="cache-size" datatype="integer" default="5000"/>
+    <key name="cache-size" datatype="byte-size" default="5000"/>
     <key name="pool-size" datatype="integer" default="7"/>
     <key name="version-pool-size" datatype="integer" default="3"/>
     <key name="version-cache-size" datatype="integer" default="100"/>