Print ignore message DefaultSecurityFilterChain

When either `web.ignoring().mvcMatchers(...)` or
`web.ignoring().antMatchers(...)` methods are used, for all their
variations, the DefaultSecurityFilterChain class now indicates
correctly through its ouput what paths are ignored according the
`ignoring()` settings.

Closes gh-9334

config/src/test/java/org/springframework/security/config/annotation/web/configuration/ignore/package-info.java

@@ -0,0 +1,50 @@
+/*
+ * Copyright 2002-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * Test package for path patterns that must be ignored by Spring Security and must be
+ * indicated/notified through the output, it thanks to the
+ * <code>DefaultSecurityFilterChain</code>'s constructor.
+ *
+ * <p>
+ * <b>NOTE:</b> be advised that to test if a path(s) was really ignored or not, by
+ * simplicity, is checking the output shown in the test report, it based with the pattern
+ * <code>"Will not secure /ABC"</code>, where <code>ABC</code> was defined through the
+ * <code>web.ignoring()</code> approach. Is very important edit the
+ * <code>logback-test.xml</code> file (of this module) to change
+ * <code>level="${sec.log.level:-WARN}"</code> to
+ * <code>level="${sec.log.level:-INFO}"</code>
+ *
+ * <p>
+ * In the handler methods do not return the view name (i.e:
+ * <code>return "something"</code>) based on the path value (i.e:
+ * <code>@GetMapping(path = "/something")</code>), otherwise the tests fail with:
+ *
+ * <pre class="code">
+ * javax.servlet.ServletException:
+ * Circular view path [something]:
+ * would dispatch back to the current handler URL [/something] again.
+ * Check your ViewResolver setup!
+ * (Hint: This may be the result of an unspecified view, due to default view name generation.)
+ * </pre>
+ *
+ * That's why the all handler methods are based with the
+ * <code>return "something/something"</code> pattern.
+ *
+ * @author Manuel Jordan
+ * @since 5.5
+ */
+package org.springframework.security.config.annotation.web.configuration.ignore;