Accept (_) escape for / in environment controller

Fixes gh-264

spring-cloud-config-server/src/main/java/org/springframework/cloud/config/server/resource/ResourceController.java

@@ -65,6 +65,11 @@ public class ResourceController {
 			@PathVariable String profile, @PathVariable String label,
 			@PathVariable String path) throws IOException {
 		StandardEnvironment environment = new StandardEnvironment();
+		if (label != null && label.contains("(_)")) {
+			// "(_)" is uncommon in a git branch name, but "/" cannot be matched
+			// by Spring MVC
+			label = label.replace("(_)", "/");
+		}
 		environment.getPropertySources().addAfter(
 				StandardEnvironment.SYSTEM_PROPERTIES_PROPERTY_SOURCE_NAME,
 				new EnvironmentPropertySource(

spring-cloud-config-server/src/test/java/org/springframework/cloud/config/server/resource/ResourceControllerTests.java

@@ -78,4 +78,11 @@ public class ResourceControllerTests {
 		assertEquals("foo: ${foo}", resource);
 	}
 
+	@Test
+	public void labelWithSlash() throws Exception {
+		this.environmentRepository.setSearchLocations("classpath:/test");
+		String resource = this.controller.resolve("foo", "bar", "dev(_)spam", "foo.txt");
+		assertEquals("foo: dev_bar/spam", resource);
+	}
+
 }

spring-cloud-config-server/src/test/resources/test/dev/spam/foo.txt

@@ -0,0 +1 @@
+foo: dev_bar/spam