don't allow signin view redirect to different host

[meomap]

Current signin view accept next parameter for redirect after login successfully but it don't safe check url. It could be exploited to redirect to different page other than current host

[coveralls]

Coverage increased (+0.01%) to 95.592% when pulling a22fe9d on meomap:signin-view-safe-url-redirect into 7dfb3d5 on bread-and-pepper:master.

[bclermont]

so this project is dead or what? bugs fix are ignored?

[wunki]

I have not been using Django for years, but @swistakm has done a tremendous job keeping this project alive. If however he also doesn't have the time anymore, it's up to him to declare it dead. Or maybe a new maintainer steps up.