tree 26ffd1af3dc49ac6e166488ea1367fc421eeacea
parent 856c9df4fa573eca3cddbb19cebf44b099456991
author Ying Wang <wangying@google.com> 1308355535 -0700
committer Ying Wang <wangying@google.com> 1308355804 -0700

Uniq the system properties.

If multiple items with the same key appear in a config variable,
only the first item is taken.

Change-Id: Icf57befafb36ec35dd4d48c8c3ec595f353f68e7