[rfc][icedtea-web] have bash in shebang instead of sh or get rid of bashism

[Jiri Vanek]

After short discussion with Omair, we agreed that this

	http://icedtea.classpath.org/hg/release/icedtea-web-1.4/rev/8f13202ea201

IS probably better then get rid of bashism completely.

So I would like to forward-port this patch to head.

ok?