AP5346 or Oxaliplatin in Treating Patients With Metastatic and/or Unresectable Recurrent Head and Neck Cancer

head and neck cancer, recurrent squamous cell carcinoma of the hypopharynx, recurrent squamous cell carcinoma of the larynx, recurrent squamous cell carcinoma of the lip and oral cavity, recurrent squamous cell carcinoma of the nasopharynx, recurrent squamous cell carcinoma of the oropharynx, stage iii squamous cell carcinoma of the hypopharynx, stage iii squamous cell carcinoma of the larynx, stage iii squamous cell carcinoma of the lip and oral cavity, stage iii squamous cell carcinoma of the nasopharynx, stage iii squamous cell carcinoma of the oropharynx, stage iv squamous cell carcinoma of the hypopharynx