Docs: Adds section on user defined preload options
generic init.d: dash does not support EUID.  Issue #1815
generic init.d: stat not portable. Issue #1815

The `stat` utility tends to vary across *nixes. This relies instead upon the
hopefully more portable `ls` and `cut` commands to determine ownership and
permission modes.
generic init.d: fix forgotten dashes. Issue #1815
rst typo
Documents task_retry signal.  Closes #1835
Wording
fixes typo
Updates Changelog
Replaces sphinxonctrib-issuetracker with something that does not require one Github API request for every issue
Updates Changelog
Merge branch 'master' into 3.1
Bumps version to 3.1.9
Removes irrelevant test output
Pyopenssl does not work well on Python3 (requires string object but signatures are not valid utf-8)
Release date for 3.1.9