Docs/influx fix (#4037)

* Moved some images, unset executable bit and shebang on non-executable file

* Fixed some documentation warnings generated from Python files

* Added kickstart setup QHT

* Added cache group / region /division overview

* Moved traffic ops administration into a single sub-section

Also added documentation for the Traffic Ops configuration files

* Fix Influx config defaulting to secure

* Fix inaccurate link, add versionadded directive to smtp config section

* clarify the purpose of 'workers'

Author: ocket8888

…/source/admin/traffic_ops/images/bad.png docs/source/admin/images/bad.pngdocs/source/admin/traffic_ops/images/bad.png renamed to docs/source/admin/images/bad.png docs/source/admin/traffic_ops/images/bad.png renamed to docs/source/admin/images/bad.png

@@ -36,7 +36,7 @@ Once everything is installed, you will need to configure the servers to talk to
 	:maxdepth: 3
 	:glob:
 
-	traffic_ops/*
+	traffic_ops.rst
 	traffic_portal/*
 	traffic_monitor.rst
 	traffic_router.rst

…source/admin/traffic_ops/images/good.png docs/source/admin/images/good.pngdocs/source/admin/traffic_ops/images/good.png renamed to docs/source/admin/images/good.png docs/source/admin/traffic_ops/images/good.png renamed to docs/source/admin/images/good.png

@@ -0,0 +1,48 @@
+..
+..
+.. Licensed under the Apache License, Version 2.0 (the "License");
+.. you may not use this file except in compliance with the License.
+.. You may obtain a copy of the License at
+..
+..     http://www.apache.org/licenses/LICENSE-2.0
+..
+.. Unless required by applicable law or agreed to in writing, software
+.. distributed under the License is distributed on an "AS IS" BASIS,
+.. WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+.. See the License for the specific language governing permissions and
+.. limitations under the License.
+..
+
+.. _Creating-CentOS-Kickstart:
+
+**********************************
+Creating the CentOS Kickstart File
+**********************************
+The Kickstart file is a text file, containing a list of items, each identified by a keyword. This file can be generated using the `Red Hat Kickstart Configurator application <https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/5/html/installation_guide/ch-redhat-config-kickstart>`_, or it can be written from scratch. The Red Hat Enterprise Linux installation program also creates a sample Kickstart file based on the options selected during installation. It is written to the file :file:`/root/anaconda-ks.cfg` in this case. This file is editable using most text editors.
+
+Generating a System Image
+=========================
+#. Create a Kickstart file.
+#. Create a boot media with the Kickstart file or make the Kickstart file available on the network.
+#. Make the installation tree available.
+#. Start the Kickstart installation.
+
+.. code-block:: shell
+	:caption: Creating a New System Image Definition Tree from an Existing One
+
+	# Starting from the Kickstart root directory (`/var/www/files` by default)
+	mkdir newdir
+	cd newdir/
+
+	# In this example, the pre-existing system image definition tree is for CentOS 7.4 located in `centos74`
+	cp -r ../centos74/* .
+	vim ks.src
+	vim isolinux/isolinux.cfg
+	cd ..
+	vim osversions.cfg
+
+:file:`ks.src` is a standard, Kickstart-formatted file that the will be used to create the Kickstart (ks.cfg) file for the install whenever a system image is generated from the source tree. :file:`ks.src` is a template - it will be overwritten by any information set in the form submitted from :menuselection:`Tools --> Generate ISO` in Traffic Portal. Ultimately, the two are combined to create the final Kickstart file (:file:`ks.cfg`).
+
+.. Note:: It is highly recommended for ease of use that the system image source trees be kept under 1GB in size.
+
+.. seealso:: For in-depth instructions, please see `Kickstart Installation <https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Installation_Guide/s1-kickstart2-howuse.html>`_ in the Red Hat documentation.