fix helpers used to sign S3 requests with boto connections
fix helpers used to sign S3 requests with boto connections

dangra/scrapy,raphaelfruneaux/scrapy,Djlavoy/scrapy,KublaikhanGeek/scrapy,nfunato/scrapy,fontenele/scrapy,Lucifer-Kim/scrapy,zorojean/scrapy,devGregA/scrapy,wangjun/scrapy,curita/scrapy,pawelmhm/scrapy,avtoritet/scrapy,wenyu1001/scrapy,ylcolala/scrapy,hectoruelo/scrapy,rahulsharma1991/scrapy,sardok/scrapy,codebhendi/scrapy,URXtech/scrapy,eliasdorneles/scrapy,agusc/scrapy,AaronTao1990/scrapy,ArturGaspar/scrapy,kashyap32/scrapy,profjrr/scrapy,nfunato/scrapy,Digenis/scrapy,hyrole/scrapy,agreen/scrapy,nikgr95/scrapy,bmess/scrapy,dracony/scrapy,Timeship/scrapy,zackslash/scrapy,pombredanne/scrapy,liyy7/scrapy,fpy171/scrapy,jorik041/scrapy,jdemaeyer/scrapy,starrify/scrapy,nikgr95/scrapy,finfish/scrapy,barraponto/scrapy,nett55/scrapy,johnardavies/scrapy,rolando/scrapy,zhangtao11/scrapy,Allianzcortex/scrapy,YeelerG/scrapy,hbwzhsh/scrapy,Bourneer/scrapy,WilliamKinaan/scrapy,coderabhishek/scrapy,godfreyy/scrapy,lacrazyboy/scrapy,agreen/scrapy,amboxer21/scrapy,mlyundin/scrapy,CodeJuan/scrapy,mlyundin/scrapy,wujuguang/scrapy,joshlk/scrapy,nikgr95/scrapy,snowdream1314/scrapy,xiao26/scrapy,Digenis/scrapy,eLRuLL/scrapy,KublaikhanGeek/scrapy,kazitanvirahsan/scrapy,Chenmxs/scrapy,dgillis/scrapy,darkrho/scrapy-scrapy,rootAvish/scrapy,kimimj/scrapy,Partoo/scrapy,livepy/scrapy,1yvT0s/scrapy,famorted/scrapy,joshlk/scrapy,rdowinton/scrapy,legendtkl/scrapy,z-fork/scrapy,ramiro/scrapy,xiao26/scrapy,coderabhishek/scrapy,Lucifer-Kim/scrapy,scorphus/scrapy,tntC4stl3/scrapy,ylcolala/scrapy,joshlk/scrapy,tagatac/scrapy,tliber/scrapy,ylcolala/scrapy,nguyenhongson03/scrapy,wenyu1001/scrapy,URXtech/scrapy,fpy171/scrapy,ENjOyAbLE1991/scrapy,rolando-contrib/scrapy,devGregA/scrapy,GregoryVigoTorres/scrapy,zorojean/scrapy,beni55/scrapy,fqul/scrapy,cursesun/scrapy,raphaelfruneaux/scrapy,JacobStevenR/scrapy,ssteo/scrapy,ramiro/scrapy,kazitanvirahsan/scrapy,YeelerG/scrapy,IvanGavran/scrapy,darkrho/scrapy-scrapy,jiezhu2007/scrapy,yusofm/scrapy,umrashrf/scrapy,AaronTao1990/scrapy,rahul-c1/scrapy,wenyu1001/scrapy,jc0n/scrapy,dhenyjarasandy/scrapy,w495/scrapy,scorphus/scrapy,rdowinton/scrapy,farhan0581/scrapy,shaform/scrapy,pawelmhm/scrapy,crasker/scrapy,JacobStevenR/scrapy,agreen/scrapy,Ryezhang/scrapy,shaform/scrapy,nowopen/scrapy,tliber/scrapy,Cnfc19932/scrapy,tliber/scrapy,mlyundin/scrapy,beni55/scrapy,CENDARI/scrapy,fqul/scrapy,olafdietsche/scrapy,rahul-c1/scrapy,jamesblunt/scrapy,jorik041/scrapy,bmess/scrapy,gbirke/scrapy,heamon7/scrapy,hyrole/scrapy,hansenDise/scrapy,crasker/scrapy,hectoruelo/scrapy,fafaman/scrapy,rolando/scrapy,AaronTao1990/scrapy,zackslash/scrapy,Allianzcortex/scrapy,kimimj/scrapy,IvanGavran/scrapy,Cnfc19932/scrapy,liyy7/scrapy,rolando-contrib/scrapy,foromer4/scrapy,URXtech/scrapy,wangjun/scrapy,yidongliu/scrapy,zhangtao11/scrapy,pombredanne/scrapy,dacjames/scrapy,Zephor5/scrapy,Djlavoy/scrapy,hwsyy/scrapy,shaform/scrapy,nett55/scrapy,dgillis/scrapy,dhenyjarasandy/scrapy,carlosp420/scrapy,heamon7/scrapy,GregoryVigoTorres/scrapy,rolando-contrib/scrapy,beni55/scrapy,pombredanne/scrapy,TarasRudnyk/scrapy,moraesnicol/scrapy,csalazar/scrapy,cyberplant/scrapy,mgedmin/scrapy,jamesblunt/scrapy,umrashrf/scrapy,Timeship/scrapy,rootAvish/scrapy,songfj/scrapy,cyberplant/scrapy,songfj/scrapy,ArturGaspar/scrapy,stenskjaer/scrapy,CENDARI/scrapy,elijah513/scrapy,smaty1/scrapy,Preetwinder/scrapy,crasker/scrapy,livepy/scrapy,ssteo/scrapy,wzyuliyang/scrapy,godfreyy/scrapy,OpenWhere/scrapy,hbwzhsh/scrapy,Djlavoy/scrapy,w495/scrapy,rdowinton/scrapy,wujuguang/scrapy,z-fork/scrapy,tagatac/scrapy,kmike/scrapy,dhenyjarasandy/scrapy,TarasRudnyk/scrapy,huoxudong125/scrapy,ramiro/scrapy,darkrho/scrapy-scrapy,irwinlove/scrapy,fafaman/scrapy,fontenele/scrapy,Geeglee/scrapy,Adai0808/scrapy-1,carlosp420/scrapy,Timeship/scrapy,webmakin/scrapy,olorz/scrapy,wujuguang/scrapy,agusc/scrapy,pfctdayelise/scrapy,barraponto/scrapy,ENjOyAbLE1991/scrapy,jorik041/scrapy,redapple/scrapy,pfctdayelise/scrapy,yarikoptic/scrapy,hectoruelo/scrapy,IvanGavran/scrapy,pablohoffman/scrapy,agusc/scrapy,avtoritet/scrapy,arush0311/scrapy,zackslash/scrapy,olorz/scrapy,legendtkl/scrapy,olafdietsche/scrapy,elacuesta/scrapy,fontenele/scrapy,cyberplant/scrapy,tntC4stl3/scrapy,hansenDise/scrapy,amboxer21/scrapy,starrify/scrapy,snowdream1314/scrapy,cleydson/scrapy,irwinlove/scrapy,kalessin/scrapy,dgillis/scrapy,rklabs/scrapy,webmakin/scrapy,zjuwangg/scrapy,raphaelfruneaux/scrapy,haiiiiiyun/scrapy,eliasdorneles/scrapy,yarikoptic/scrapy,arush0311/scrapy,Partoo/scrapy,Geeglee/scrapy,nett55/scrapy,CodeJuan/scrapy,haiiiiiyun/scrapy,jeffreyjinfeng/scrapy,wangjun/scrapy,WilliamKinaan/scrapy,chekunkov/scrapy,kmike/scrapy,sigma-random/scrapy,profjrr/scrapy,Adai0808/scrapy-1,jc0n/scrapy,finfish/scrapy,rklabs/scrapy,snowdream1314/scrapy,jiezhu2007/scrapy,jeffreyjinfeng/scrapy,pranjalpatil/scrapy,Ryezhang/scrapy,barraponto/scrapy,ashishnerkar1/scrapy,eliasdorneles/scrapy,hwsyy/scrapy,fqul/scrapy,sardok/scrapy,cleydson/scrapy,yusofm/scrapy,kalessin/scrapy,sigma-random/scrapy,nguyenhongson03/scrapy,scrapy/scrapy,chekunkov/scrapy,jc0n/scrapy,GregoryVigoTorres/scrapy,jiezhu2007/scrapy,OpenWhere/scrapy,Digenis/scrapy,Parlin-Galanodel/scrapy,hwsyy/scrapy,zhangtao11/scrapy,lacrazyboy/scrapy,lacrazyboy/scrapy,elacuesta/scrapy,haiiiiiyun/scrapy,mgedmin/scrapy,legendtkl/scrapy,zorojean/scrapy,foromer4/scrapy,pawelmhm/scrapy,pranjalpatil/scrapy,devGregA/scrapy,github-account-because-they-want-it/scrapy,rolando/scrapy,curita/scrapy,wzyuliyang/scrapy,famorted/scrapy,amboxer21/scrapy,hansenDise/scrapy,JacobStevenR/scrapy,cyrixhero/scrapy,eLRuLL/scrapy,redapple/scrapy,Bourneer/scrapy,elijah513/scrapy,kazitanvirahsan/scrapy,dacjames/scrapy,cyrixhero/scrapy,Preetwinder/scrapy,chekunkov/scrapy,kalessin/scrapy,taito/scrapy,arush0311/scrapy,jeffreyjinfeng/scrapy,TarasRudnyk/scrapy,irwinlove/scrapy,yidongliu/scrapy,YeelerG/scrapy,github-account-because-they-want-it/scrapy,ssh-odoo/scrapy,csalazar/scrapy,aivarsk/scrapy,yusofm/scrapy,pablohoffman/scrapy,OpenWhere/scrapy,Zephor5/scrapy,yidongliu/scrapy,webmakin/scrapy,gbirke/scrapy,Zephor5/scrapy,pfctdayelise/scrapy,johnardavies/scrapy,cleydson/scrapy,elacuesta/scrapy,Slater-Victoroff/scrapy,johnardavies/scrapy,dangra/scrapy,dangra/scrapy,scrapy/scrapy,olafdietsche/scrapy,Slater-Victoroff/scrapy,moraesnicol/scrapy,1yvT0s/scrapy,mgedmin/scrapy,ashishnerkar1/scrapy,csalazar/scrapy,godfreyy/scrapy,dracony/scrapy,ENjOyAbLE1991/scrapy,Bourneer/scrapy,rklabs/scrapy,stenskjaer/scrapy,zjuwangg/scrapy,CENDARI/scrapy,rahulsharma1991/scrapy,fpy171/scrapy,starrify/scrapy,dacjames/scrapy,foromer4/scrapy,finfish/scrapy,z-fork/scrapy,redapple/scrapy,xiao26/scrapy,Partoo/scrapy,bmess/scrapy,pablohoffman/scrapy,huoxudong125/scrapy,Preetwinder/scrapy,kimimj/scrapy,farhan0581/scrapy,CodeJuan/scrapy,livepy/scrapy,1yvT0s/scrapy,zjuwangg/scrapy,Adai0808/scrapy-1,wzyuliyang/scrapy,scorphus/scrapy,eLRuLL/scrapy,cyrixhero/scrapy,ssh-odoo/scrapy,taito/scrapy,aivarsk/scrapy,olorz/scrapy,ArturGaspar/scrapy,songfj/scrapy,rahulsharma1991/scrapy,elijah513/scrapy,kashyap32/scrapy,pranjalpatil/scrapy,aivarsk/scrapy,profjrr/scrapy,kmike/scrapy,coderabhishek/scrapy,cursesun/scrapy,rootAvish/scrapy,github-account-because-they-want-it/scrapy,codebhendi/scrapy,Geeglee/scrapy,taito/scrapy,curita/scrapy,farhan0581/scrapy,fafaman/scrapy,nguyenhongson03/scrapy,avtoritet/scrapy,Cnfc19932/scrapy,w495/scrapy,cursesun/scrapy,WilliamKinaan/scrapy,huoxudong125/scrapy,Ryezhang/scrapy,carlosp420/scrapy,stenskjaer/scrapy,smaty1/scrapy,jdemaeyer/scrapy,famorted/scrapy,liyy7/scrapy,kashyap32/scrapy,KublaikhanGeek/scrapy,yarikoptic/scrapy,Parlin-Galanodel/scrapy,heamon7/scrapy,rahul-c1/scrapy,Allianzcortex/scrapy,ssh-odoo/scrapy,hbwzhsh/scrapy,nowopen/scrapy,jdemaeyer/scrapy,hyrole/scrapy,ssteo/scrapy,codebhendi/scrapy,dracony/scrapy,scrapy/scrapy,umrashrf/scrapy,Lucifer-Kim/scrapy,nowopen/scrapy,Parlin-Galanodel/scrapy,Chenmxs/scrapy,tntC4stl3/scrapy,tagatac/scrapy,nfunato/scrapy,Chenmxs/scrapy,moraesnicol/scrapy,Slater-Victoroff/scrapy,smaty1/scrapy