Issue: SPR-12182

Issue: SPR-12173

Issue: SPR-12174
Issue: SPR-12157

Issue: SPR-12171

Per the Javadoc for the SocketUtils() constructor, SocketUtils can be
instantiated as a Spring Bean in XML configuration files; however,
SocketUtils is currently abstract which prevents such usage.

This commit removes the 'abstract' declaration thereby allowing
SocketUtils to be instantiated as a Spring bean.

Issue: SPR-12169

Issue: SPR-12157

Prior to this change, getForRequestUrl implementation would only work
for applications with a non-empty servlet path. So web applications
mapped to "/" would trigger a IllegalStateException while checking the
current request against the request path within the current mapping.

This change relaxes this and only check that the path within mapping is
within the request URL.

Issue: SPR-12158

This commit also fixes the AbstractMappingJacksonResponseBodyAdvice Javadoc.

Issue: SPR-12149

Issue: SPR-12151

Issue: SPR-12149

Dropped RequestEntity's template variable methods in order to remove dependencies on org.springframework.web

Instead, as outlined in the revised javadoc, let's recommend manual UriTemplate usage for RequestEntity URI input.

Issue: SPR-11752

This change moves the resource-cache configuration to the
<resource-chain/> tag, since enabling/disabling resource cache should
be driven by a property or a SpEL expression.

So now that configuration can be set with XML attributes:

  <mvc:resource-chain resource-cache="true"
  cache-manager="resourceCache" cache-name="test-resource-cache">

In order to mirror the JavaConfig behavior, the "resource-cache"
attribute is required.

Issue: SPR-12129

Issue: SPR-14036

Issue: SPR-11870

Before this change ResourceUrlProvider used getUrlMap to detect
ResourceHttpRequestHandler instances, however the map may contain bean
names as is the case when using <mvc:resources>. Instead it now uses
getHandlerMap.

This change adds a ResourceUrlProvider bean to the
ResourceBeanDefinitionParser to match the same in the Java config.
For consistency the name of the bean in the Java config is renamed.

Also a ResourceUrlProviderExposingInterceptor is declares as a global
MappedInterceptor.

Issue: SPR-11310
Issue: SPR-10548

Issue: SPR-12148

Issue: SPR-12141

Issue: SPR-12145

ImportRegistry as a package-visible top-level interface which can easily be shared within the package

Issue: SPR-12128

Prior to this change, ResourceTransformers that transformed resources by
updating the links to other resources, worked only if links were
relative to the resource being transformed.
For example, when the CssLinkResourceTransformer rewrote links within
a "main.css" resource, only links such as "../css/other.css" were
rewritten.

Using relative links is a recommended approach, because it's totally
independent from the application servlet path, context path, mappings...

This change allows absolute links to be rewritten by those Transformers,
provided those links are accurate and point to existing resources.

Issue: SPR-12137

Issue: SPR-12113

Update ImportRegistry to track all import registrations that occur
against an importing class (rather than just keeping the last). In
addition, prune imported classes from the registry when a configuration
class is removed during the REGISTER_BEAN ConfigurationPhase.

This update prevents incorrect metadata from being injected into an
ImportAware class which is imported twice by different configurations
classes (when one of the configuration classes will be ultimately skipped
due to a @Condition).

Issue: SPR-12128

AbstractAutowireCapableBeanFactory avoids early FactoryBean instantiation on currently created configuration bean

Issue: SPR-12141