Bug 5906: add a documentation note for unix daemons vs. multiprocessing daemons

Doc/library/multiprocessing.rst

@@ -374,7 +374,9 @@ The :mod:`multiprocessing` package mostly replicates the API of the
 
       Note that a daemonic process is not allowed to create child processes.
       Otherwise a daemonic process would leave its children orphaned if it gets
-      terminated when its parent process exits.
+      terminated when its parent process exits. Additionally, these are **not**
+      Unix daemons or services, they are normal processes that will be
+      terminated (and not joined) if non-dameonic processes have exited.
 
    In addition to the  :class:`Threading.Thread` API, :class:`Process` objects
    also support the following attributes and methods: