On petition of either party, after a judgment for alimony or other allowance for either party or a child, or after a judgment for the appointment of trustees to receive and hold property for the use of either party or a child, and subject to section 17, the court may revise and alter the judgment, respecting the amount or payment of the alimony or allowance, and also respecting the appropriation and payment of the principal and income of the property held in trust, and may make any judgment respecting any of the matters that the court might have made in the original action.