9K seems to be handling all jruby.xxx properties

they're used e.g. with gems such as jruby-openssl the jruby.openssl.xxx namespace is used : 

```
:~/workspace/oss/jruby$ jruby -J-Djruby.openssl.debug=true ...
jruby: warning: unknown property jruby.openssl.debug
jruby: warning: unknown property jruby.openssl.debug
```

... no longer works as it used to on JRuby 1.7
