just keep the jruby-home when set by jruby to "uri:classsloader:/META-IN...

well if this https://github.com/jruby/jruby/pull/2031 goes in, it would be nice for jruby-rack to just use it. currently jruby-rack leaves the jruby.home detection to jruby only if it can not find a jar-url to the jruby.home.

so the idea is there is ONE for ALL ;)

just see if you can accommodate such a change.