Drop support for Java 5?

Hi,

during the work on gbuildification of stax module found this condition:

.IF "$(JAVANUMVER:s/.//)" >= "000100060000"
    @echo "Your java version already contains StAX"

In fact, Sun Java StAX XML Processor ships as part of Sun Java  
Standard Edition 6 runtime [1].

Java 7 is today the current version, Java 6 is the old one and Java 5  
is the ancient one. Does it still make sense to support it in LO 3.7  
or even in LO 4.0?

Would it be an option to drop Java 1.5 support (upgrading configure.in and
all other places) and as the consequence drop stax module?

1. http://www.jcp.org/en/jsr/detail?id=173

Regards
David