Add sendfile TestCase that can be skipped if sendfile not installed
Add sendfile TestCase that can be skipped if sendfile not installed

timorieber/wagtail,nutztherookie/wagtail,quru/wagtail,bjesus/wagtail,mjec/wagtail,serzans/wagtail,kurtrwall/wagtail,jnns/wagtail,mayapurmedia/wagtail,iho/wagtail,Klaudit/wagtail,FlipperPA/wagtail,Klaudit/wagtail,torchbox/wagtail,chrxr/wagtail,rsalmaso/wagtail,tangentlabs/wagtail,WQuanfeng/wagtail,inonit/wagtail,mixxorz/wagtail,mikedingjan/wagtail,mixxorz/wagtail,Tivix/wagtail,timorieber/wagtail,Tivix/wagtail,kaedroho/wagtail,takeshineshiro/wagtail,zerolab/wagtail,davecranwell/wagtail,chrxr/wagtail,iho/wagtail,rv816/wagtail,wagtail/wagtail,inonit/wagtail,takeshineshiro/wagtail,serzans/wagtail,nealtodd/wagtail,gasman/wagtail,nealtodd/wagtail,quru/wagtail,hanpama/wagtail,zerolab/wagtail,hamsterbacke23/wagtail,KimGlazebrook/wagtail-experiment,Pennebaker/wagtail,hanpama/wagtail,jnns/wagtail,hamsterbacke23/wagtail,quru/wagtail,nutztherookie/wagtail,jordij/wagtail,kaedroho/wagtail,mayapurmedia/wagtail,gogobook/wagtail,marctc/wagtail,inonit/wagtail,nealtodd/wagtail,serzans/wagtail,nealtodd/wagtail,jnns/wagtail,thenewguy/wagtail,kurtrwall/wagtail,janusnic/wagtail,nrsimha/wagtail,nutztherookie/wagtail,Tivix/wagtail,thenewguy/wagtail,Toshakins/wagtail,timorieber/wagtail,hamsterbacke23/wagtail,tangentlabs/wagtail,rv816/wagtail,nimasmi/wagtail,iansprice/wagtail,darith27/wagtail,gogobook/wagtail,nimasmi/wagtail,timorieber/wagtail,takeshineshiro/wagtail,kaedroho/wagtail,Pennebaker/wagtail,mephizzle/wagtail,nrsimha/wagtail,bjesus/wagtail,rjsproxy/wagtail,wagtail/wagtail,takeflight/wagtail,torchbox/wagtail,thenewguy/wagtail,gasman/wagtail,WQuanfeng/wagtail,m-sanders/wagtail,gasman/wagtail,Klaudit/wagtail,rsalmaso/wagtail,jnns/wagtail,hamsterbacke23/wagtail,marctc/wagtail,mephizzle/wagtail,KimGlazebrook/wagtail-experiment,mayapurmedia/wagtail,FlipperPA/wagtail,iho/wagtail,tangentlabs/wagtail,kaedroho/wagtail,rjsproxy/wagtail,nrsimha/wagtail,kurtw/wagtail,mjec/wagtail,wagtail/wagtail,nimasmi/wagtail,iansprice/wagtail,kurtw/wagtail,wagtail/wagtail,KimGlazebrook/wagtail-experiment,chrxr/wagtail,gasman/wagtail,Toshakins/wagtail,zerolab/wagtail,iansprice/wagtail,m-sanders/wagtail,zerolab/wagtail,WQuanfeng/wagtail,zerolab/wagtail,rv816/wagtail,gasman/wagtail,mayapurmedia/wagtail,davecranwell/wagtail,marctc/wagtail,JoshBarr/wagtail,wagtail/wagtail,rsalmaso/wagtail,darith27/wagtail,nutztherookie/wagtail,darith27/wagtail,davecranwell/wagtail,mixxorz/wagtail,KimGlazebrook/wagtail-experiment,janusnic/wagtail,marctc/wagtail,rjsproxy/wagtail,jordij/wagtail,inonit/wagtail,FlipperPA/wagtail,kurtw/wagtail,takeflight/wagtail,JoshBarr/wagtail,jordij/wagtail,gogobook/wagtail,rjsproxy/wagtail,mikedingjan/wagtail,nilnvoid/wagtail,rsalmaso/wagtail,rsalmaso/wagtail,WQuanfeng/wagtail,kurtrwall/wagtail,mephizzle/wagtail,m-sanders/wagtail,bjesus/wagtail,Klaudit/wagtail,Toshakins/wagtail,Pennebaker/wagtail,mephizzle/wagtail,nimasmi/wagtail,kurtrwall/wagtail,Pennebaker/wagtail,rv816/wagtail,JoshBarr/wagtail,gogobook/wagtail,kurtw/wagtail,iansprice/wagtail,takeflight/wagtail,nilnvoid/wagtail,jordij/wagtail,hanpama/wagtail,janusnic/wagtail,quru/wagtail,thenewguy/wagtail,FlipperPA/wagtail,janusnic/wagtail,iho/wagtail,bjesus/wagtail,takeflight/wagtail,kaedroho/wagtail,darith27/wagtail,hanpama/wagtail,mjec/wagtail,thenewguy/wagtail,mixxorz/wagtail,nrsimha/wagtail,Toshakins/wagtail,mjec/wagtail,torchbox/wagtail,JoshBarr/wagtail,nilnvoid/wagtail,serzans/wagtail,mixxorz/wagtail,mikedingjan/wagtail,chrxr/wagtail,Tivix/wagtail,torchbox/wagtail,davecranwell/wagtail,m-sanders/wagtail,tangentlabs/wagtail,nilnvoid/wagtail,takeshineshiro/wagtail,mikedingjan/wagtail