Comment 3 for bug 706565

Actually, /etc/cron.d/ is part of Linux Standards Base Core Specification 4.0. http://refspecs.linux-foundation.org/LSB_4.0.0/LSB-Core-generic/LSB-Core-generic/etc.html

Yes, .dpkg-* are ignored for a reason, but that also ignores the LSB FHS. If you installed the lsb packages and expect a Linux Standards Base system, then
`run-parts --verbose --lsbsysinit /etc/cron.hourly/`
should accept `org.debian.my.cron.job.sh` and `debian.org-cron.job.with.dots.sh` and `job.cron` and other filenames with dots.

http://manpages.ubuntu.com/manpages/trusty/en/man8/run-parts.8.html

       If the --lsbsysinit option is given, then the names must not end in
       .dpkg-old or .dpkg-dist or .dpkg-new or .dpkg-tmp, and must belong to
       one or more of the following namespaces: the LANANA-assigned namespace
       (^[a-z0-9]+$); the LSB hierarchical and reserved namespaces
       (^_?([a-z0-9_.]+-)+[a-z0-9]+$); and the Debian cron script namespace
       (^[a-zA-Z0-9_-]+$).

http://refspecs.linux-foundation.org/LSB_4.0.0/LSB-Core-generic/LSB-Core-generic/etc.html#FHS-NAME-RULES
-Linux assigned names says to use dns.name.com names when you do not have a registered name for a particular project.
http://www.lanana.org/lsbreg/cron/index.html