Thierry:

There is part of this patch's change that may cause authbind to fail:

-# You may pass JVM startup parameters to Java here.
-#JAVA_OPTS="-Djava.awt.headless=true -Djava.net.preferIPv4Stack=true -Xmx128m"
+# You may pass JVM startup parameters to Java here. If unset, the default
+# options (-Djava.awt.headless=true -Xmx128m) will be used.
+#JAVA_OPTS="-Djava.awt.headless=true -Xmx128m"

Removing -Djava.net.preferIPv4Stack=true means that the JVM's network
stack might default to IPv6, and in that case authbind will (seemingly
mysteriously) fail.  Authbind works only with IPv4.  I think few users
use IPv6 today.  It might eventually get popular, and if it does, it
would be a good idea if we're not always making software that defaults
to IPv4.  But, I think the default should be IPv4, especially when
certain JDK bugs are encountered only when the JDK's startup switches do
not specify IPv4.  So, I'm proposing we add back the
-Djava.net.preferIPv4Stack=true startup switch.

-- 
Using incorrect JVM Garbage Collector
https://bugs.launchpad.net/bugs/541520
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