'Cast some more things as truthful.'

def munge_params(self, filter_munge, params):

    for k in filter_munge:
        if ((k in params) and (params[k] in ['true', '1'])):
            params[k] = 'True'
        if ((k in params) and (params[k] in ['false', '0'])):
            params[k] = 'False'
    return params
