Make the URL of the ProviderSignInController and ConnectController configurable

spring-social-web/src/main/java/org/springframework/social/connect/web/ConnectController.java

@@ -66,7 +66,7 @@
  * @author Roy Clarkson
  */
 @Controller
-@RequestMapping("/connect")
+@RequestMapping("${spring.social.connect.url:/connect}")
 public class ConnectController implements InitializingBean {
 
 	private final static Log logger = LogFactory.getLog(ConnectController.class);

spring-social-web/src/main/java/org/springframework/social/connect/web/ProviderSignInController.java

@@ -51,7 +51,7 @@
  * @author Keith Donald
  */
 @Controller
-@RequestMapping("/signin")
+@RequestMapping("${spring.social.signin.url:/signin}")
 public class ProviderSignInController implements InitializingBean {
 
 	private final static Log logger = LogFactory.getLog(ProviderSignInController.class);