No gift, grant, bequest or devise to religious, educational, charitable or benevolent uses which shall in other respects be valid under the laws of this state, shall be invalid by reason of the indefiniteness or uncertainty of the persons designated as the beneficiaries thereunder in the instrument creating the same. If in the instrument creating such gift, grant, bequest or devise, there is a trustee named to execute the same, the legal title to the lands or property given, granted, devised or bequeathed for such purposes, shall vest in such trustee. If no trustee shall be named in such instrument, or if a vacancy occurs in the trusteeship, then the trust shall vest in the district court for the proper county, and shall be executed by some trustee appointed for that purpose by or under the direction of the court; and the court may make such orders or decrees as may be necessary to vest the title to such lands or property in the trustee so appointed.