(imitating org.apache.tools.tar).  Also made it pure copyright ASF.
For those interested in legalities, my understanding is I'm granting
the ASF copyright on this code but have my own copyright on the code
as it existed before the grant.  That means I can include my own code
in my book without following the Apache license, but I can't use
improvements to the ASF code without following the Apache license
(as is perfectly appropriate).

Changed build.xml to no longer build com/**.

-jh-

PR:
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git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@267889 13f79535-47bb-0310-9956-ffa450edef68