Fixes #7307

Fixes #7307

* Added capability to support multiple keys, so clients from different
  machines can connect to a single daemon instance
* Any activity on the daemon will cause the timeout to extend, so that the
  daemon must be idle for the full number of minutes before it will auto-
  shutdown
* Various other small fixes to remove some redundancy

Fixes #5171

This fixes an issue related to the new run_command changes, whereby
Popen fails to run a command when an executable is specified + shell=False
and there are multiple positional arguments (see Popen docs for details)

Fixes #6047

Fixes #6047

Fixes #5812

is a class method. Pyflakes complained about it.

- explictely import json, since this is used ( only to silence pyflakes)
- remove shutil as it is unused

Fixes #4485 add an ipv6 parameter to accelerate so that the daemon will bind to an ipv6 port instead of ipv4

Make it slightly more clear what side of the connection is missing keyczar if using accelerate mode.

on EL5. Fix #4763

unsupported string prefix in 2.4

http://docs.python.org/release/2.4/ref/strings.html
This is also ignored on later version of python 2
and is present only for python 3 conversion, as seen
on http://docs.python.org/2/reference/lexical_analysis.html#string-literals

Also see http://stackoverflow.com/questions/6269765/what-does-the-b-character-do-in-front-of-a-string-literal

Fix https://github.com/ansible/ansible/issues/4739

This setting makes the timeout for each play configurable, rather than
hard-coding it at 300 seconds (now the default if left unspecified)

Fixes #4162

Commands will now be started up in a separate task from the main
handler thread, so that it can be monitored for completeness while
sending a keepalive packet back to the controller to avoid a socket
receive timeout.

Fixes #4321

This was breaking at least the script module, so it would seem best
to check for it and set it to the default executable value

Caveats:
* requiretty must be disabled in the sudoers config
* asking for a password doesn't work yet, so any sudoers users must
  be configured with NOPASSWD
* if not starting the daemon as root, the user running the daemon
  must have sudoers entries to allow them to run the command as the
  target sudo_user