SEC-1636: Add optimizations for simple pattern cases in AntPathRequestMatcher. "/**" and "**" are treated as universal matches and a trailing "/**" is now optimized using a substring match.

config/src/main/java/org/springframework/security/config/http/MatcherType.java

@@ -35,7 +35,7 @@ public enum MatcherType {
     }
 
     public BeanDefinition createMatcher(String path, String method) {
-        if ("/**".equals(path) && method == null) {
+        if (("/**".equals(path) || "**".equals(path)) && method == null) {
             return new RootBeanDefinition(AnyRequestMatcher.class);
         }