Fixed #29349 -- Doc'd the default behavior of router.allow_relation().
Fixed #29349 -- Doc'd the default behavior of router.allow_relation().

felixxm/django,freakboy3742/django,schinckel/django,charettes/django,frankvdp/django,EmadMokhtar/Django,theo-l/django,rsalmaso/django,apollo13/django,wkschwartz/django,kaedroho/django,django/django,rsalmaso/django,fenginx/django,claudep/django,schinckel/django,manhhomienbienthuy/django,django/django,elena/django,googleinterns/django,kaedroho/django,elena/django,kaedroho/django,timgraham/django,googleinterns/django,charettes/django,takis/django,auvipy/django,pauloxnet/django,theo-l/django,MarkusH/django,takis/django,frankvdp/django,apollo13/django,django/django,blighj/django,takis/django,EmadMokhtar/Django,auvipy/django,manhhomienbienthuy/django,MarkusH/django,felixxm/django,manhhomienbienthuy/django,timgraham/django,simonw/django,ghickman/django,solarissmoke/django,shaib/django,elena/django,atul-bhouraskar/django,pauloxnet/django,rsalmaso/django,wkschwartz/django,adamchainz/django,shaib/django,atul-bhouraskar/django,charettes/django,felixxm/django,apollo13/django,frankvdp/django,wkschwartz/django,atul-bhouraskar/django,monetate/django,manhhomienbienthuy/django,django/django,schinckel/django,dsanders11/django,schinckel/django,monetate/django,pauloxnet/django,auvipy/django,apollo13/django,georgemarshall/django,shaib/django,takis/django,claudep/django,fenginx/django,MarkusH/django,charettes/django,freakboy3742/django,blighj/django,monetate/django,atul-bhouraskar/django,wkschwartz/django,blighj/django,ghickman/django,koordinates/django,ghickman/django,claudep/django,timgraham/django,fenginx/django,shaib/django,simonw/django,fenginx/django,ghickman/django,theo-l/django,claudep/django,elena/django,pauloxnet/django,solarissmoke/django,dsanders11/django,frankvdp/django,dsanders11/django,EmadMokhtar/Django,koordinates/django,googleinterns/django,koordinates/django,solarissmoke/django,adamchainz/django,timgraham/django,blighj/django,adamchainz/django,theo-l/django,googleinterns/django,koordinates/django,auvipy/django,simonw/django,dsanders11/django,MarkusH/django,solarissmoke/django,freakboy3742/django,georgemarshall/django,monetate/django,georgemarshall/django,felixxm/django,adamchainz/django,georgemarshall/django,simonw/django,rsalmaso/django