Update Security features documentation

Closes gh-10844

spring-boot-project/spring-boot-docs/src/main/asciidoc/spring-boot-features.adoc

@@ -2848,10 +2848,10 @@ that you can see how to set things up.
 
 [[boot-features-security]]
 == Security
-If Spring Security is on the classpath, then web applications are secure by default with
+If Spring Security is on the classpath, then web applications are secure by default. Spring Boot
-'`basic`' authentication on all HTTP endpoints. To add method-level security to a web
+relies on Spring Security’s content-negotiation strategy to determine whether to use `httpBasic`
-application, you can also add `@EnableGlobalMethodSecurity` with your desired settings.
+or `formLogin`. To add method-level security to a web application, you can also add `@EnableGlobalMethodSecurity`
-Additional information can be found in the {spring-security-reference}#jc-method[Spring
+with your desired settings. Additional information can be found in the {spring-security-reference}#jc-method[Spring
 Security Reference].
 
 The default `AuthenticationManager` has a single user (the user name is '`user`', and the
@@ -2867,49 +2867,29 @@ NOTE: If you fine-tune your logging configuration, ensure that the
 `org.springframework.boot.autoconfigure.security` category is set to log `INFO`-level
 messages. Otherwise, the default password is not printed.
 
-You can change the password by providing a `security.user.password`. This and other
-useful properties are externalized via
-{sc-spring-boot-autoconfigure}/security/SecurityProperties.{sc-ext}[`SecurityProperties`]
-(properties with a prefix of "security").
-
 The default security configuration is implemented in `SecurityAutoConfiguration` and in
 the classes imported from there (`SpringBootWebSecurityConfiguration` for web security
 and `AuthenticationManagerConfiguration` for authentication configuration, which is also
 relevant in non-web applications). To switch off the default web application security
-configuration completely, you can add a bean with `@EnableWebSecurity` (this does not
+configuration completely, you can add a bean of type `WebSecurityConfigurerAdapter` (this does not
-disable the authentication manager configuration or Actuator's security). To customize
+disable the authentication manager configuration or Actuator's security).
-it, you normally use external properties and beans of type `WebSecurityConfigurerAdapter`
-(for example, to add form-based login).
-
-NOTE: If you add `@EnableWebSecurity` and also disable Actuator security, you get the
-default form-based login for the entire application, unless you add a custom
-`WebSecurityConfigurerAdapter`.
 
 To also switch off the authentication manager configuration, you can add a bean of type
-`AuthenticationManager` or configure the global `AuthenticationManager` by autowiring an
+`UserDetailsService`, `AuthenticationProvider` or `AuthenticationManager`.
-`AuthenticationManagerBuilder` into a method in one of your `@Configuration` classes.
 There are several secure applications in the {github-code}/spring-boot-samples/[Spring
 Boot samples] to get you started with common use cases.
 
 The basic features you get by default in a web application are:
 
-* An `AuthenticationManager` bean with in-memory store and a single user (see
+* A `UserDetailsService` bean with in-memory store and a single user with a generated password.
-`SecurityProperties.User` for the properties of the user).
+* Form-based login or HTTP Basic security (depending on Content-Type) for the entire application (including
-* Ignored (insecure) paths for common static resource locations (`+/css/**+`, `+/js/**+`,
+actuator endpoints if actuator is on the classpath).
-`+/images/**+`, `+/webjars/**+`, and `+**/favicon.ico+`).
-* HTTP Basic security for all other endpoints.
-* Security events published to Spring's `ApplicationEventPublisher` (successful and
-unsuccessful authentication and access denied).
-* Common low-level features (HSTS, XSS, CSRF, caching) provided by Spring Security.
 
-All of the above can be switched on and off or modified by setting external properties
+Access rules can be overriden by adding a custom `WebSecurityConfigurerAdapter`. Spring Boot
-(`+security.*+`). To override the access rules without changing any other auto-configured
+provides convenience methods that can be used to override access rules for actuator endpoints
-features, add a `@Bean` of type `WebSecurityConfigurerAdapter` with
+and static resources. `EndpointRequest` can be used to create a `RequestMatcher` that is based on the
-`@Order(SecurityProperties.ACCESS_OVERRIDE_ORDER)` and configure it to meet your needs.
+`management.endpoints.web.base-path` property. `StaticResourceRequest` can be used to
-
+create a `RequestMatcher` for static resources in commonly used locations.
-NOTE: By default, a `WebSecurityConfigurerAdapter` matches any path. If you do not want
-to completely override Spring Boot's auto-configured access rules, your adapter must
-explicitly configure the paths that you do want to override.
 
 [[boot-features-security-oauth2]]
 === OAuth2