must reallocate in incr/decr if item in use
must reallocate in incr/decr if item in use

lost this earlier somehow. if item is in flight, don't overwrite it in
place during add_delta.

mitliucak/memcached,DSrcl/memcached,ClearwaterCore/memcached,allen8807/memcached-1,surajdharmapuram/memcached,Dhruva6/memcached,bpzhang/memcached,tomykaira/memcached,dkrotx/memcached-dd,leedc/memcached,fengshao0907/memcached,amyvmiwei/memcached,alexandermerritt/memcached,jeremiahyan/memcached,msg7086/repcached,neutronsharc/memcached,neutronsharc/memcached,angusfenying/memcached-win64,romanticode/memcached,dkrotx/memcached-dd,niaomingjian/memcached,mdounin/memcached,DigitalAce/memcached,13693100472/memcached,williamcheungthu/memcached,Danzeer/memcached,msg7086/repcached,mitliucak/memcached,sagark/memcached-accel,jeremiahyan/memcached,neutronsharc/memcached,msg7086/repcached,rmccullagh/memcached,tellapart/memcached,niaomingjian/memcached,guikcd/memcached,surajdharmapuram/memcached,samt42/memcached,rmccullagh/memcached,elfchief/memcached,sagark/memcached-accel,williamcheungthu/memcached,gencer/memcached,rhli/memcached,ZhangZhenhua/memcached,tmharrisonwang/memcached,bpzhang/memcached,guikcd/memcached,surajdharmapuram/memcached,leverich/memcached-affinity,jbergstroem/memcached,gencer/memcached,memcached/memcached,williamcheungthu/memcached,jeremiahyan/memcached,ClearwaterCore/memcached,rmccullagh/memcached,ClearwaterCore/memcached,Metaswitch/memcached,sagark/memcached-accel,gencer/memcached,msg7086/repcached,EdwardLee03/memcached,samanbarghi/memcached,myPublicGit/memcached,alexandermerritt/memcached,emcconville/memcached,williamcheungthu/memcached,memcached/memcached,mitliucak/memcached,samt42/memcached,romanticode/memcached,allen8807/memcached-1,Danzeer/memcached,cloudrain21/memcached,EdwardLee03/memcached,samanbarghi/memcached,xiaosl/memcached,angusfenying/memcached-win64,neutronsharc/memcached,EdwardLee03/memcached,guikcd/memcached,tomykaira/memcached,jeremiahyan/memcached,rhli/memcached,dormando/memcached,Dhruva6/memcached,Dhruva6/memcached,leverich/memcached-affinity,amyvmiwei/memcached,emcconville/memcached,Danzeer/memcached,13693100472/memcached,sagark/memcached-accel,dormando/memcached,ClearwaterCore/memcached,mdounin/memcached,bpzhang/memcached,zaycev/memcached,surajdharmapuram/memcached,13693100472/memcached,dustin/memcached,msg7086/repcached,tomykaira/memcached,Dhruva6/memcached,emcconville/memcached,kamyu104/memcached,samt42/memcached,myPublicGit/memcached,dianerdianer/memcached,leedc/memcached,tellapart/memcached,dkrotx/memcached-dd,dustin/memcached,13693100472/memcached,myPublicGit/memcached,cloudrain21/memcached,mitliucak/memcached,alexandermerritt/memcached,Metaswitch/memcached,tmharrisonwang/memcached,gencer/memcached,memcached/memcached,myPublicGit/memcached,mdounin/memcached,xiaosl/memcached,tellapart/memcached,elfchief/memcached,kamyu104/memcached,elfchief/memcached,DigitalAce/memcached,dianerdianer/memcached,DSrcl/memcached,Metaswitch/memcached,tomykaira/memcached,niaomingjian/memcached,niaomingjian/memcached,xiaosl/memcached,elfchief/memcached,samanbarghi/memcached,amyvmiwei/memcached,Danzeer/memcached,dianerdianer/memcached,rhli/memcached,alexandermerritt/memcached,emcconville/memcached,angusfenying/memcached-win64,Metaswitch/memcached,leverich/memcached-affinity,memcached/memcached,tmharrisonwang/memcached,fengshao0907/memcached,guikcd/memcached,bpzhang/memcached,Distrotech/memcached,romanticode/memcached,Distrotech/memcached,Distrotech/memcached,zaycev/memcached,zaycev/memcached,angusfenying/memcached-win64,DSrcl/memcached,EdwardLee03/memcached,tmharrisonwang/memcached,kamyu104/memcached,DSrcl/memcached,ZhangZhenhua/memcached,jbergstroem/memcached,fengshao0907/memcached,samanbarghi/memcached,dormando/memcached,ZhangZhenhua/memcached,leedc/memcached,rmccullagh/memcached,memcached/memcached,fengshao0907/memcached,dustin/memcached,guikcd/memcached,ZhangZhenhua/memcached,rhli/memcached,gencer/memcached,rmccullagh/memcached,Metaswitch/memcached,zaycev/memcached,DigitalAce/memcached,leedc/memcached,dianerdianer/memcached,sagark/memcached-accel,cloudrain21/memcached,kamyu104/memcached,samt42/memcached,dkrotx/memcached-dd,dormando/memcached,romanticode/memcached,amyvmiwei/memcached,dormando/memcached,allen8807/memcached-1,jbergstroem/memcached,elfchief/memcached,13693100472/memcached,xiaosl/memcached,cloudrain21/memcached,allen8807/memcached-1