Listen for SIGTERM as well and gracefully shutdown in that case.

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@4959 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/presents/server/PresentsServer.java

@@ -148,7 +148,7 @@ public class PresentsServer
         log.info("Starting up server [os=" + si.osToString() + ", jvm=" + si.jvmToString() +
                  ", mem=" + si.memoryToString() + "].");
 
-        // register SIGINT (ctrl-c) and a SIGHUP handlers
+        // register SIGTERM, SIGINT (ctrl-c) and a SIGHUP handlers
         boolean registered = false;
         try {
             registered = new SunSignalHandler().init(this);