Autologin: Remove deprecated autologin methods

Remove methods from manager because autologin
is now handled with special backends (AutoLoginBackend).

The session is used to store the status about a remote
user authentication to send a 401 header to the client
upon logout.

refs #6461
Autologin: Fix javascript logout code

Window onload event handler comes to late. Change
part of the code to use jQuery.

refs #6461
Merge branch 'bugfix/autologin-logout-6461'

fixes #6461
Autologin: Test logged session against remote user

fixes #6462
Vagrant: Fix Icinga 2 MySQL creation

refs #6741
Revert "Autologin: Test logged session against remote user"

This reverts commit 64954e99244f26cc6b6dccc7d60a253c105bd550.

If the strip_username_regex is configured on the autologin backend and applies on a user's name,
the authenticated user's username does never match the REMOTE_USER server variable.
Thus the application will logout/login on every request which results in a redirect loop.

refs #6462
AutoLogin/Logout: Remove own session namespace

Store data in the user and implement interface to left
backends store remote information.

fixes #6461
AutoLogin: Check the remote username against logged in user

fixes #6462
Vagrant: Update monitoring-plugins/livestatus

Move all hardcoded versions to the header too.

fixes #6818
monitoring/Perfdata: ignore invalid min/max

key=23;0;0;0;0 and key=23;;;; lead to division by zero exceptions
This should fix this by ignoring empty strings for min/max (formerly
it got "converted" to float(0)) and also ignores min == max.

fixes #6828
ActionController: set a default window title

In case a controller action didn't set a view title this fix restores
the default title on XHR requests.

fixes #6797
CLI/monitoring/list: fix DataView-related exception

This uses the renamed DataView serviceStatus instead of the former
status and fixes the problem that CLI still assumed to have fetch
and count function on the DataView.

fixes #6777
Update README.md with general & install info

We don't want users to install it in production environments but we
certainly also want to prevent them from doing so by calling `vagrant
up`. Therefore the native method described in doc/installation.md works
for now until there are proper installation methods (packages, etc).

Add support hints, and updated Icinga 2 paths as well.

fixes #6880
Properly support Apache 2.2 and 2.4

Can be done by using <IfModule> directive.
Tested on fc20, el7 and Wheezy.

refs #6771
Fix that a form's submit button is not being sent when the method is GET

fixes #6890
Update rpm builds

refs #6401
refs #6403
Fix README, update spec header

refs #6401
refs #6404
Make it possible to translate the process info view

refs #6610
Encode url before passing it to Icinga\Form\Dashboard\AddUrlForm

fixes #6611
Escape linefeeds and carriage returns in commands and show them as html

fixes #6088