Return a list of sysctl parameters for this minion

    CLI Example:

    .. code-block:: bash

        salt '*' sysctl.show

def show(config_file=False):
    '''
    Return a list of sysctl parameters for this minion

    CLI Example:

    .. code-block:: bash

        salt '*' sysctl.show
    '''
    roots = (
        'kern',
        'vm',
        'vfs',
        'net',
        'hw',
        'machdep',
        'user',
        'ddb',
        'proc',
        'emul',
        'security',
        'init'
    )
    cmd = 'sysctl -ae'
    ret = {}
    out = __salt__['cmd.run'](cmd, output_loglevel='trace')
    comps = ['']
    for line in out.splitlines():
        if any([line.startswith('{0}.'.format(root)) for root in roots]):
            comps = re.split('[=:]', line, 1)
            ret[comps[0]] = comps[1]
        elif comps[0]:
            ret[comps[0]] += '{0}\n'.format(line)
        else:
            continue
    return ret