docs: def msi_conformant_version():
      '''
      An msi installer uninstalls/replaces a lower "internal version" of itself.
      "internal version" is ivMAJOR.ivMINOR.ivBUILD with max values 255.255.65535.
      Using the build nr allows continuous integration of the installer.
      "Display version" is indipendent and free format: Year.Month.Bugfix as in Salt 2016.11.3.
      Calculation of the internal version fields:
          ivMAJOR = 'short year' (2 digits).
          ivMINOR = 20*(month-1) + Bugfix
              Combine Month and Bugfix to free ivBUILD for the build number
              This limits Bugfix < 20.
              The msi automatically replaces only 19 bugfixes of a month, one must uninstall manually.
          ivBUILD = git commit count (noc)
              noc for tags is 0, representing the final word, translates to the highest build number (65535).
  
      Examples:
        git checkout    Display version      Internal version    Remark
        develop         2016.11.0-742        16.200.742          The develop branch has bugfix 0
        2016.11         2016.11.2-78         16.202.78
        2016.11         2016.11.9-88         16.209.88
        2018.8          2018.3.2-1306        18.42.1306
        v2016.11.0      2016.11.0            16.200.65535        Tags have noc 0
        v2016.11.2      2016.11.2            16.202.65535
  
      '''
      short_year = int(six.text_type(__saltstack_version__.major)[2:])
      month = __saltstack_version__.minor
      bugfix = __saltstack_version__.bugfix
      if bugfix > 19:
          bugfix = 19
      noc = __saltstack_version__.noc
      if noc == 0:
          noc = 65535
      return '{}.{}.{}'.format(short_year, 20*(month-1)+bugfix, noc)