S0420, Sorafenib in Treating Patients With Recurrent or Metastatic Head and Neck Cancer

metastatic squamous neck cancer with occult primary squamous cell carcinoma, recurrent metastatic squamous neck cancer with occult primary, recurrent salivary gland 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, recurrent squamous cell carcinoma of the paranasal sinus and nasal cavity, recurrent verrucous carcinoma of the larynx, recurrent verrucous carcinoma of the oral cavity, salivary gland squamous cell carcinoma