Simplify use of AC_ARG_WITH; no need to set with_foo explicitly.
Simplify use of AC_ARG_WITH; no need to set with_foo explicitly.

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