LWJGL2 (and 3?): Calling stop(true) from within update() freezes

So, this is simple:
When calling stop(true), the context changes an AtomicBoolean and waits on a lock.
This AtomicBoolean is then read by the update loop after rendering, which tears down the context.

Now when calling stop(true) from inside the update loop, we're blocking the update loop and thus freeze everything. Since calling stop from the update loop is the most common thing, we might want to document this, as we can't properly change that fact or detect the callstack.