Made the manifest for the optional package actually conform to the specification and put versions in dewey decimal format.

Also made optional package an extension.


git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@272160 13f79535-47bb-0310-9956-ffa450edef68

build.xml

@@ -611,16 +611,18 @@
 
       <manifest>
         <section name="${optional.package}">
+          <attribute name="Extension-name"
+                     value="org.apache.tools.ant.taskdesfs.optional" />
           <attribute name="Specification-Title"
                      value="Apache Ant Optional Tasks" />
           <attribute name="Specification-Version"
-                     value="${version}" />
+                     value="${manifest-version}" />
           <attribute name="Specification-Vendor"
                      value="Apache Software Foundation" />
           <attribute name="Implementation-Title"
                      value="org.apache.tools.ant.taskdefs.optional" />
           <attribute name="Implementation-Version"
-                     value="${version} ${TODAY}" />
+                     value="${manifest-version}" />
           <attribute name="Implementation-Vendor"
                      value="Apache Software Foundation" />
         </section>