2.6 changelog gen/version/root dir cleanup (#40421)

* patched in changelog gen stuff from stable-2.5
* Makefile updates
* release.py as single-source-of-truth
* Remove obsolete ansible-core-sitemap.xml file.
* Move ROADMAP.rst into README.rst.
* dynamic rpm changelog, zap old deb/rpm changelogs
* fix changelog in MANIFEST.in
* Remove obsolete hacking/update.sh script.
* Remove ref to deleted authors script.
* Remove ref to removed module-formatter script.
* Update headings to match script names.
* MANIFEST.in cleanup
* removed RELEASES.txt and versions.yml
* removed obsolete release generation playbook/bits (not used since 2.5)
* misc Makefile cleanup
* speculative changes to DEB versioning
* allow override of DEB_VERSION/DEB_RELEASE

hacking/ticket_stubs/bug_is_really_a_question.md

@@ -0,0 +1,17 @@
+List Information
+================
+
+Hi!
+
+Thanks very much for your interest in Ansible.  It sincerely means a lot to us. 
+
+This appears to be a user question, and we'd like to direct these kinds of things to either the mailing list or the IRC channel.
+
+   * IRC: #ansible on irc.freenode.net   
+   * mailing list: https://groups.google.com/forum/#!forum/ansible-project
+
+If you can stop by there, we'd appreciate it.  This allows us to keep the issue tracker for bugs, pull requests, RFEs and the like.
+
+Thank you once again and we look forward to seeing you on the list or IRC.  Thanks!
+
+