Added server-side streams for workflows and external clients.

Makefile

@@ -522,14 +522,18 @@ workflowcheck: $(WORKFLOWCHECK)
 check: lint shell-check
 
 ##### Tests #####
+# verify-test-log reads the whole file, so a log left behind by an earlier run
+# would be judged as if it belonged to this one.
 clean-test-output:
 	@printf $(COLOR) "Delete test output..."
 	@rm -rf $(TEST_OUTPUT_ROOT)
+	@rm -f test.log
 	@go clean -testcache
 
 build-tests:
 	@printf $(COLOR) "Build tests..."
-	@CGO_ENABLED=$(CGO_ENABLED) go test $(TEST_TAG_FLAG) -exec="true" -count=0 $(TEST_DIRS)
+	@CGO_ENABLED=$(CGO_ENABLED) go test $(TEST_TAG_FLAG) -exec="true" -count=0 $(filter-out $(MIXED_BRAIN_TEST_ROOT)%,$(TEST_DIRS))
+	@cd $(MIXED_BRAIN_TEST_ROOT) && CGO_ENABLED=1 go test $(TEST_TAG_FLAG) -exec="true" -count=0 ./...
 
 unit-test: clean-test-output
 	@printf $(COLOR) "Run unit tests..."