Bundle slf4j binding to the war.
See the comment in war/pom.xml for detailed discussion.

This is fundamentally a "damned if I do, damned if I don't" situation,
but given that JENKINS-12334 is a fatal error, and the downside of
bundling the binding jar is "multiple binding" warning, it seems like
the lesser evil is to bundle it and risk some warnings.

If the sections unfold/fold etc and layout changes, the save button
needs to update its location

Formatting error in the rootDN inference code. It shouldn't include
attribute name.

Bundled plugins should be laid down as *.jpi, with proper measure to
migrate existing bits.