controllers.root: make mapproxy optional
controllers.root: make mapproxy optional

skylines-project/skylines,Turbo87/skylines,Harry-R/skylines,snip/skylines,skylines-project/skylines,RBE-Avionik/skylines,kerel-fs/skylines,TobiasLohner/SkyLines,TobiasLohner/SkyLines,snip/skylines,Harry-R/skylines,Harry-R/skylines,shadowoneau/skylines,RBE-Avionik/skylines,RBE-Avionik/skylines,skylines-project/skylines,dkm/skylines,dkm/skylines,Turbo87/skylines,shadowoneau/skylines,Harry-R/skylines,Turbo87/skylines,dkm/skylines,kerel-fs/skylines,RBE-Avionik/skylines,Turbo87/skylines,dkm/skylines,TobiasLohner/SkyLines,shadowoneau/skylines,skylines-project/skylines,snip/skylines,kerel-fs/skylines,shadowoneau/skylines