Move documentation into place.

Documentation needs to be between bundle/body prototype,
and opening curly bracket.
bootstrap/failsafe.cf: remove, it lives in core/libpromises/failsafe.cf
Redmine#5315: disable masterfiles auto-update by default
Redmine#53135: cfe_internal/example_use_goals.cf: remove
Redmine#5315: mention 'libraries' will be removed in 3.7
Move host_info_report to cfe_internal
Merge pull request #178 from nickanderson/cleanup/host_info_report

Move host_info_report to cfe_internal
move update_def common bundle back from def.cf to update.cf
lib/3.6/files.cf: add convenience bundles
lib/3.6/processes.cf: add cfe_process_kill bundle
update.cf: bring in a copy of the cf_apache_group and cf_apache_user
Merge pull request #179 from tzz/redmine5315-convenience-file-bundles

lib/3.6/files.cf: add convenience bundles
Minor renaming of new bodies
Add diagnostics database maintenance policy
Ignore bodies and bundles in documentation
add a bundle to do postgresql maintenance (vacuumdb)
Merge pull request #181 from maciejmrowiec/master

Add diagnostics database maintenance policy
Make maintenance of diagnostics a little more generic and add connection errors diagnostic cleanup
Merge pull request #183 from maciejmrowiec/master

Make maintenance of diagnostics a little more generic and add connection...
patch code by the feedback