Change ft_t to sox_format_t, eff_t to sox_effect_t, and remove some obsolete effect chain functions.
Change ft_t to sox_format_t, eff_t to sox_effect_t, and remove some
obsolete effect chain functions.

mhartzel/sox_personal_fork,davel/sox,CaptainHayashi/sox,Distrotech/sox,jacksonh/sox,Distrotech/sox,cbagwell/sox,Motiejus/sox,mhartzel/sox_personal_fork,mhartzel/sox_personal_fork,cbagwell/sox,jacksonh/sox,uklauer/sox,MageSlayer/sox,CaptainHayashi/sox,Distrotech/sox,MageSlayer/sox,pcqpcq/sox,Motiejus/sox,jacksonh/sox,MageSlayer/sox,Motiejus/sox,davel/sox,pcqpcq/sox,cbagwell/sox,mhartzel/sox_personal_fork,davel/sox,MageSlayer/sox,jacksonh/sox,pcqpcq/sox,cbagwell/sox,uklauer/sox,uklauer/sox,Motiejus/sox,pcqpcq/sox,CaptainHayashi/sox,CaptainHayashi/sox,Distrotech/sox,uklauer/sox,davel/sox,MageSlayer/sox