[ Thanks to Andrew
Weber for this link. ]
“The directory /etc/init.d has links to the Upstart script for
applications converted to Upstart. These applications have
completed the transformation to the upstart process. Note that only
some of the applications in the /etc/init.d directory have been
converted as this will be a process. As the list is reviewed it is
clear that some applications lie vsftpd have upstart jobs while
other applications that do start on boot do not have upstart jobs
like apache2.”