[FIX] http: keep debug mode in rediction
[FIX] http: keep debug mode in rediction

The parameter forward_debug is used to keep the debug mode during redirection.
Previous code was setting the debug to None which is ignored by werkzeug, making
the option useless.

Closes #12107

hip-odoo/odoo,tvibliani/odoo,makinacorpus/odoo,datenbetrieb/odoo,ehirt/odoo,NeovaHealth/odoo,leorochael/odoo,Daniel-CA/odoo,shingonoide/odoo,leorochael/odoo,synconics/odoo,Nowheresly/odoo,laslabs/odoo,NeovaHealth/odoo,ygol/odoo,mustafat/odoo-1,bplancher/odoo,hassoon3/odoo,hip-odoo/odoo,synconics/odoo,spadae22/odoo,Daniel-CA/odoo,tvibliani/odoo,spadae22/odoo,laslabs/odoo,leorochael/odoo,Nowheresly/odoo,OpenUpgrade/OpenUpgrade,makinacorpus/odoo,Daniel-CA/odoo,Nowheresly/odoo,BT-ojossen/odoo,jfpla/odoo,CatsAndDogsbvba/odoo,synconics/odoo,hassoon3/odoo,dfang/odoo,OpenUpgrade/OpenUpgrade,bplancher/odoo,laslabs/odoo,Noviat/odoo,Nowheresly/odoo,Daniel-CA/odoo,Noviat/odoo,ehirt/odoo,Adel-Magebinary/odoo,dfang/odoo,odootr/odoo,Adel-Magebinary/odoo,NeovaHealth/odoo,Noviat/odoo,datenbetrieb/odoo,NeovaHealth/odoo,alexcuellar/odoo,hassoon3/odoo,mustafat/odoo-1,odootr/odoo,makinacorpus/odoo,funkring/fdoo,Nowheresly/odoo,storm-computers/odoo,shingonoide/odoo,datenbetrieb/odoo,Elico-Corp/odoo_OCB,diagramsoftware/odoo,eino-makitalo/odoo,alexcuellar/odoo,alexcuellar/odoo,Endika/odoo,alexcuellar/odoo,alexcuellar/odoo,synconics/odoo,ehirt/odoo,diagramsoftware/odoo,vnsofthe/odoo,CatsAndDogsbvba/odoo,vnsofthe/odoo,ygol/odoo,ehirt/odoo,Nowheresly/odoo,diagramsoftware/odoo,hassoon3/odoo,shingonoide/odoo,glovebx/odoo,vnsofthe/odoo,ygol/odoo,eino-makitalo/odoo,diagramsoftware/odoo,BT-ojossen/odoo,microcom/odoo,funkring/fdoo,vnsofthe/odoo,Nowheresly/odoo,Elico-Corp/odoo_OCB,eino-makitalo/odoo,Adel-Magebinary/odoo,Elico-Corp/odoo_OCB,laslabs/odoo,glovebx/odoo,glovebx/odoo,BT-ojossen/odoo,jfpla/odoo,odootr/odoo,synconics/odoo,synconics/odoo,alexcuellar/odoo,eino-makitalo/odoo,Noviat/odoo,leorochael/odoo,glovebx/odoo,Elico-Corp/odoo_OCB,Endika/odoo,jfpla/odoo,dfang/odoo,hassoon3/odoo,odootr/odoo,OpenUpgrade/OpenUpgrade,datenbetrieb/odoo,Endika/odoo,NeovaHealth/odoo,ehirt/odoo,glovebx/odoo,spadae22/odoo,tvibliani/odoo,Elico-Corp/odoo_OCB,bplancher/odoo,makinacorpus/odoo,makinacorpus/odoo,glovebx/odoo,makinacorpus/odoo,hip-odoo/odoo,mustafat/odoo-1,Daniel-CA/odoo,CatsAndDogsbvba/odoo,funkring/fdoo,hassoon3/odoo,storm-computers/odoo,funkring/fdoo,eino-makitalo/odoo,BT-ojossen/odoo,datenbetrieb/odoo,eino-makitalo/odoo,datenbetrieb/odoo,spadae22/odoo,shingonoide/odoo,ehirt/odoo,odootr/odoo,OpenUpgrade/OpenUpgrade,makinacorpus/odoo,diagramsoftware/odoo,bplancher/odoo,bplancher/odoo,CatsAndDogsbvba/odoo,OpenUpgrade/OpenUpgrade,tvibliani/odoo,spadae22/odoo,leorochael/odoo,datenbetrieb/odoo,mustafat/odoo-1,CatsAndDogsbvba/odoo,tvibliani/odoo,BT-ojossen/odoo,dfang/odoo,Noviat/odoo,spadae22/odoo,Daniel-CA/odoo,Noviat/odoo,glovebx/odoo,ehirt/odoo,microcom/odoo,ygol/odoo,dfang/odoo,storm-computers/odoo,hip-odoo/odoo,ygol/odoo,mustafat/odoo-1,CatsAndDogsbvba/odoo,storm-computers/odoo,CatsAndDogsbvba/odoo,funkring/fdoo,ygol/odoo,Endika/odoo,OpenUpgrade/OpenUpgrade,Adel-Magebinary/odoo,bplancher/odoo,diagramsoftware/odoo,BT-ojossen/odoo,shingonoide/odoo,leorochael/odoo,mustafat/odoo-1,ygol/odoo,vnsofthe/odoo,diagramsoftware/odoo,leorochael/odoo,tvibliani/odoo,microcom/odoo,hip-odoo/odoo,eino-makitalo/odoo,BT-ojossen/odoo,funkring/fdoo,Endika/odoo,Daniel-CA/odoo,Noviat/odoo,NeovaHealth/odoo,laslabs/odoo,alexcuellar/odoo,Endika/odoo,vnsofthe/odoo,dfang/odoo,OpenUpgrade/OpenUpgrade,Adel-Magebinary/odoo,mustafat/odoo-1,Adel-Magebinary/odoo,shingonoide/odoo,jfpla/odoo,vnsofthe/odoo,spadae22/odoo,Elico-Corp/odoo_OCB,funkring/fdoo,Endika/odoo,jfpla/odoo,synconics/odoo,microcom/odoo,Adel-Magebinary/odoo,odootr/odoo,shingonoide/odoo,microcom/odoo,tvibliani/odoo,microcom/odoo,odootr/odoo,storm-computers/odoo,jfpla/odoo,hip-odoo/odoo,storm-computers/odoo,jfpla/odoo,laslabs/odoo,NeovaHealth/odoo