Made extent_zone_t use a priority queue to manage free extents instead of a disturbing sort of linked list.
Made extent_zone_t use a priority queue to manage free extents instead of a disturbing sort of linked list.

jmptrader/rethinkdb,JackieXie168/rethinkdb,jesseditson/rethinkdb,jmptrader/rethinkdb,losywee/rethinkdb,wkennington/rethinkdb,sebadiaz/rethinkdb,matthaywardwebdesign/rethinkdb,wkennington/rethinkdb,jesseditson/rethinkdb,JackieXie168/rethinkdb,pap/rethinkdb,sontek/rethinkdb,eliangidoni/rethinkdb,niieani/rethinkdb,wojons/rethinkdb,greyhwndz/rethinkdb,wojons/rethinkdb,grandquista/rethinkdb,eliangidoni/rethinkdb,elkingtonmcb/rethinkdb,4talesa/rethinkdb,sebadiaz/rethinkdb,jesseditson/rethinkdb,pap/rethinkdb,scripni/rethinkdb,losywee/rethinkdb,grandquista/rethinkdb,marshall007/rethinkdb,wujf/rethinkdb,gavioto/rethinkdb,wkennington/rethinkdb,losywee/rethinkdb,gavioto/rethinkdb,Wilbeibi/rethinkdb,eliangidoni/rethinkdb,wojons/rethinkdb,alash3al/rethinkdb,greyhwndz/rethinkdb,bpradipt/rethinkdb,victorbriz/rethinkdb,Qinusty/rethinkdb,alash3al/rethinkdb,RubenKelevra/rethinkdb,dparnell/rethinkdb,mcanthony/rethinkdb,catroot/rethinkdb,lenstr/rethinkdb,urandu/rethinkdb,AntouanK/rethinkdb,wujf/rethinkdb,yakovenkodenis/rethinkdb,mbroadst/rethinkdb,victorbriz/rethinkdb,robertjpayne/rethinkdb,AntouanK/rethinkdb,bchavez/rethinkdb,KSanthanam/rethinkdb,dparnell/rethinkdb,niieani/rethinkdb,spblightadv/rethinkdb,bpradipt/rethinkdb,captainpete/rethinkdb,gavioto/rethinkdb,wojons/rethinkdb,scripni/rethinkdb,wojons/rethinkdb,losywee/rethinkdb,victorbriz/rethinkdb,niieani/rethinkdb,marshall007/rethinkdb,scripni/rethinkdb,sebadiaz/rethinkdb,jesseditson/rethinkdb,RubenKelevra/rethinkdb,rrampage/rethinkdb,yaolinz/rethinkdb,marshall007/rethinkdb,marshall007/rethinkdb,scripni/rethinkdb,urandu/rethinkdb,Wilbeibi/rethinkdb,ajose01/rethinkdb,lenstr/rethinkdb,matthaywardwebdesign/rethinkdb,yakovenkodenis/rethinkdb,victorbriz/rethinkdb,robertjpayne/rethinkdb,eliangidoni/rethinkdb,yakovenkodenis/rethinkdb,urandu/rethinkdb,sebadiaz/rethinkdb,yakovenkodenis/rethinkdb,niieani/rethinkdb,ajose01/rethinkdb,pap/rethinkdb,dparnell/rethinkdb,4talesa/rethinkdb,robertjpayne/rethinkdb,spblightadv/rethinkdb,lenstr/rethinkdb,mcanthony/rethinkdb,niieani/rethinkdb,yakovenkodenis/rethinkdb,sebadiaz/rethinkdb,sontek/rethinkdb,wojons/rethinkdb,urandu/rethinkdb,JackieXie168/rethinkdb,matthaywardwebdesign/rethinkdb,eliangidoni/rethinkdb,pap/rethinkdb,ayumilong/rethinkdb,Qinusty/rethinkdb,ayumilong/rethinkdb,lenstr/rethinkdb,captainpete/rethinkdb,ayumilong/rethinkdb,dparnell/rethinkdb,captainpete/rethinkdb,mbroadst/rethinkdb,ajose01/rethinkdb,eliangidoni/rethinkdb,Qinusty/rethinkdb,robertjpayne/rethinkdb,wujf/rethinkdb,yakovenkodenis/rethinkdb,sontek/rethinkdb,jesseditson/rethinkdb,gdi2290/rethinkdb,sebadiaz/rethinkdb,bchavez/rethinkdb,mbroadst/rethinkdb,ajose01/rethinkdb,greyhwndz/rethinkdb,mbroadst/rethinkdb,gdi2290/rethinkdb,sbusso/rethinkdb,elkingtonmcb/rethinkdb,victorbriz/rethinkdb,sbusso/rethinkdb,grandquista/rethinkdb,tempbottle/rethinkdb,sebadiaz/rethinkdb,Qinusty/rethinkdb,JackieXie168/rethinkdb,gdi2290/rethinkdb,mcanthony/rethinkdb,gavioto/rethinkdb,greyhwndz/rethinkdb,scripni/rethinkdb,ayumilong/rethinkdb,dparnell/rethinkdb,catroot/rethinkdb,spblightadv/rethinkdb,rrampage/rethinkdb,mcanthony/rethinkdb,AntouanK/rethinkdb,bchavez/rethinkdb,tempbottle/rethinkdb,4talesa/rethinkdb,jmptrader/rethinkdb,4talesa/rethinkdb,JackieXie168/rethinkdb,ajose01/rethinkdb,rrampage/rethinkdb,grandquista/rethinkdb,mquandalle/rethinkdb,mquandalle/rethinkdb,Wilbeibi/rethinkdb,jmptrader/rethinkdb,spblightadv/rethinkdb,bchavez/rethinkdb,sbusso/rethinkdb,greyhwndz/rethinkdb,JackieXie168/rethinkdb,niieani/rethinkdb,urandu/rethinkdb,wkennington/rethinkdb,gdi2290/rethinkdb,Qinusty/rethinkdb,catroot/rethinkdb,spblightadv/rethinkdb,victorbriz/rethinkdb,jmptrader/rethinkdb,jmptrader/rethinkdb,jmptrader/rethinkdb,elkingtonmcb/rethinkdb,urandu/rethinkdb,sbusso/rethinkdb,bpradipt/rethinkdb,mquandalle/rethinkdb,robertjpayne/rethinkdb,scripni/rethinkdb,sbusso/rethinkdb,wojons/rethinkdb,spblightadv/rethinkdb,4talesa/rethinkdb,KSanthanam/rethinkdb,grandquista/rethinkdb,marshall007/rethinkdb,ajose01/rethinkdb,tempbottle/rethinkdb,niieani/rethinkdb,mcanthony/rethinkdb,mquandalle/rethinkdb,rrampage/rethinkdb,4talesa/rethinkdb,captainpete/rethinkdb,ayumilong/rethinkdb,lenstr/rethinkdb,captainpete/rethinkdb,JackieXie168/rethinkdb,victorbriz/rethinkdb,gdi2290/rethinkdb,gdi2290/rethinkdb,sebadiaz/rethinkdb,AntouanK/rethinkdb,catroot/rethinkdb,RubenKelevra/rethinkdb,Wilbeibi/rethinkdb,AntouanK/rethinkdb,dparnell/rethinkdb,bchavez/rethinkdb,KSanthanam/rethinkdb,wojons/rethinkdb,matthaywardwebdesign/rethinkdb,matthaywardwebdesign/rethinkdb,urandu/rethinkdb,gdi2290/rethinkdb,RubenKelevra/rethinkdb,eliangidoni/rethinkdb,marshall007/rethinkdb,RubenKelevra/rethinkdb,alash3al/rethinkdb,jesseditson/rethinkdb,yaolinz/rethinkdb,bpradipt/rethinkdb,Qinusty/rethinkdb,greyhwndz/rethinkdb,grandquista/rethinkdb,elkingtonmcb/rethinkdb,lenstr/rethinkdb,mquandalle/rethinkdb,gavioto/rethinkdb,bchavez/rethinkdb,ajose01/rethinkdb,jesseditson/rethinkdb,spblightadv/rethinkdb,wujf/rethinkdb,mquandalle/rethinkdb,Qinusty/rethinkdb,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