Merge pull request #923 from Eric-Brison/3.2-A4096

add CLASS import key (closes #4096) (closes #4097)
correct notice when no file yet (refs #3120)
correct strict notice in PU (refs #4120)
correct notice in import with no methods (refs #4120)
correct strict in wsh:fdl_sendmail usage due to pear mail (refs #4120)
correct strict in PU (refs #4120)