[BUG] salt converts 'false', 'off' to False, 'true', 'on' to True for cmd.run and cmd.run_all

Sorry if this has been fixed already, given the keywords it's difficult to search.

Description

The salt command is being overzealous by converting command names to Python values as described above,

Setup
I think the setup is irrelevant, as this seems to be happening on the command line.

Steps to Reproduce the behavior

[root@singlenode tmp]# salt '*' cmd.run 'false'
6287c6e3-f7d1-46e5-b216-8219e5a938de:
    /bin/sh: False: command not found
ERROR: Minions returned with non-zero exit code

[root@singlenode tmp]# salt '*' cmd.run_all 'on'
6287c6e3-f7d1-46e5-b216-8219e5a938de:
    ----------
    pid:
        762624
    retcode:
        127
    stderr:
        /bin/sh: True: command not found
    stdout:
ERROR: Minions returned with non-zero exit code

Expected behavior
Commands false and on should be run instead of False and True.

Versions Report
salt-3002.2-1.el7.noarch

Start with the Salt command-line handling for cmd.run and cmd.run_all, then reproduce the reported commands using the issue's examples. Trace where the command argument is converted before execution; done means false, off, true, and on are passed as literal command text and the examples no longer invoke False or True.