respect value of REQUIRE_SIGNIN_VIEW (#5901)

routers/routes/routes.go

@@ -648,7 +648,7 @@ func RegisterRoutes(m *macaron.Macaron) {
 			}
 			ctx.Data["CommitsCount"] = ctx.Repo.CommitsCount
 		})
-	}, context.RepoAssignment(), context.UnitTypes(), reqRepoReleaseReader)
+	}, ignSignIn, context.RepoAssignment(), context.UnitTypes(), reqRepoReleaseReader)
 
 	m.Group("/:username/:reponame", func() {
 		m.Post("/topics", repo.TopicsPost)