This now properly also supports per user, per minion as well as
function argument limiting.

Added parameters new to 2016.03 (or simply missing in the existing config).

pillar (backwards compatibility)

Checks for 'dict' in `x.__class__.__name__` b/c
neither `type()` nor `isinstance()` is available.

!!   Not tested with an actual   !!
 !!  configured `ext_pillar` yet  !!

- jinja on RHEL/CentOS 6 has no 'mapping'
  test (see salt-formula issue #193)
- {% do ... %} allows no assignment, only
  function calls
- of course, `type(foo) is dict` doesn't
  work because it's no jinja test
- maybe `.isinstance()` would be nicer/more
  reliable

Using the old salt.engines pillar and merging it with the new
salt.[master|minion].engines pillar.
This way, it doesn't break previous behavior and permits to define
common engines on master and minion.
In the merge, the salt.[master|minion].engines pillar takes precedence
if conflict as it's the more specific pillar.

the engines are now configured using the following pillars:

* salt.master.engines
* salt.minion.engines

instead of a global salt.engines pillar.

Note: the pillar.example provided seems to assume this behaviour.
(the pillar is salt.master.engines.slack and not salt.engines.slack)

Signed-off-by: Rene Jochum <rene@jochums.at>

Signed-off-by: Rene Jochum <rene@jochums.at>

This avoids problems when values are strings containing colons. And it
mimicks what was already done for the salt-minion's configuration file.

Fixes #233.

This makes it easier for users to check the status of jobs that ran into
a timeout.

With a simple pillar like this::

    $ sudo salt-call --config-dir /srv/etc/bootstrap --pillar-root /srv/pillar pillar.get salt:pillar_roots
    local:
        ----------
        base:
            - /srv/pillar

This was generated in /etc/salt/master.d/f_defaults.conf::

    # highstate format, and is generally just key/value pairs.
    pillar_roots:base:- /srv/pillar
    #

Resulting in parse errors by salt::

    $ sudo salt '*' state.highstate
    [ERROR   ] Error parsing configuration file: /etc/salt/master.d/f_defaults.conf - while scanning a simple key
      in "<string>", line 531, column 1:
        pillar_roots:base:- /srv/pillar
        ^
    could not found expected ':'
      in "<string>", line 532, column 1:
        #
        ^
    [ERROR   ] Error parsing configuration file: /etc/salt/master.d/f_defaults.conf - while scanning a simple key
      in "<string>", line 531, column 1:
        pillar_roots:base:- /srv/pillar
        ^
    could not found expected ':'
      in "<string>", line 532, column 1:
        #
        ^

This patch will fix it as such::

          ID: salt-master
    Function: file.recurse
        Name: /etc/salt/master.d
      Result: True
     Comment: Recursively updated /etc/salt/master.d
     Started: 11:37:12.946823
    Duration: 6255.296 ms
     Changes:
              ----------
              /etc/salt/master.d/f_defaults.conf:
                  ----------
                  diff:
                      ---
                      +++
                      @@ -528,7 +528,9 @@
                       # Pillar is laid out in the same fashion as the file server, with environments,
                       # a top file and sls files. However, pillar data does not need to be in the
                       # highstate format, and is generally just key/value pairs.
                      -pillar_roots:base:- /srv/pillar
                      +pillar_roots:
                      +  base:
                      +    - /srv/pillar
                       #

Resulting in::

    # highstate format, and is generally just key/value pairs.
    pillar_roots:
      base:
        - /srv/pillar
    #