Update the "INIT INFO section" of `launch.script` to include
`initInfoProvides`, `initInfoShortDescription` and `initInfoDescription`
property substitutions.

The Maven plugin has been updated to populate substitutions with
`${project.artifactId}`, `${project.name}` and `${project.description}`.

Fixes gh-4245

* pr/4189:
  Replace Base64Encoder with Base64Utils

Replace the custom Base64Encoder class with Spring's Base64Utils which
since 4.2 can encode bytes using Java 8's encoder, commons-digest or
Java 6's JAX-B encoder.

Closes gh-4189

* pr/4242:
  Make response headers optional in /trace endpoint

Update `WebRequestTraceFilter` so that the response respects the
TraceProperties.Include.RESPONSE enum.

See gh-3948
Closes gh-4242

Effectively revert commit b396d0d2 to restore exception first logging
of exceptions for Logback and Log4j2.

This commit also introduces new extended versions of "whitespace"
padding exception loggers so that source jar information is still
included in the stacktrace.

Fixes gh-4247

Use an order relative to REQUEST_WRAPPER_FILTER_MAX_ORDER.

Closes gh-2637

Add a BeanFactoryPostProcessor to set PRESERVE_TARGET_CLASS_ATTRIBUTE
to true on all ErrorController bean definitions. Without this attribute
AOP advice on @Controllers causes ErrorController beans to be created
as JDK proxies (since they implement a single valid looking interface)
and therefore not get found by Spring MVC.

Fixes gh-4236

Fixes gh-4250

Closes gh-4161

Previously, the Actuator’s endpoints did not specify a produces
attribute on their request mappings. With Jackson’s XML binding on the
classpath, this would lead to requests made by a browser receiving
application/xml responses (due to the Accept header indicating that
application/xml is preferred). This was problematic as some of the
response payloads were not legal xml. Problems included XML tags
beginning with ‘\’ or containing ‘#’.

This commit updates the endpoints to specify that they produce
application/json. The environment and metrics endpoints have also been
updated so that always return a JSON object, even when they are
returning a single entry. This consistency avoids problems where
clients may not consider a single scalar value to be legal JSON.

Closes gh-2449

See gh-3696

Flip the default value of `addResources` for both the Maven and Gradle
plugins. This effectively turns off static resources reloading and, more
importantly, the pruning of duplicate resources from the target
directory.

As devetools is our mainstram solution for such feature, the documantion
has been updated to reflect that.

Closes gh-4227

The init script spec [1] describes a number of requirements with which
our launch.script did not comply. This commit makes the following
corrections:

 - Add support for force-reload which should be implemented by all
   init scripts
 - Don't fail restart if the service is already stopped or not running
 - Consider stop to be successful if the service is already stopped
 - Exit with 1 if stop fails (indicating a generic or unspecified error)
   rather than 3 (unimplemented feature)
 - Report a status of 1 if app is not running but the pid file exists
 - Report a status of 3 if the app is not running (no pid file)

Closes gh-4231

[1] http://refspecs.linuxbase.org/LSB_3.1.0/LSB-Core-generic/LSB-Core-generic/iniscrptact.html

A merge from 1.2.x brought back this module that was deleted on master.

Closes gh-4246

* pr/4202:
  Polish contribution
  Add spring.jersey.path property

Closes gh-4202

Provide a property to customize the application path that serves as the
base URI for a JAX-RS compliant application. If both `spring.jersey.path`
and an `@ApplicationPath` are present, the property takes precedence.

Closes gh-4201

* pr/4241:
  Remove unused property in TraceProperties

Closes gh-4241

* pr/4243:
  Fix broken link

Closes gh-4243

Update WebMvcAutoConfiguration to use a RequestContextFilter instead of
a RequestContextListener.

Using a filter is required for some Spring Session operations (see
https://github.com/spring-projects/spring-session/issues/129).

This update also has the added benefit of allowing the Response to be
accessed from RequestContextHolder.getRequestAttributes() by casting it
to ServletRequestAttributes.

Fixes gh-2637

See gh-4234

See gh-4234

See gh-4234

Update the import order settings to be a little more logical. Imports
should now be ordered:

java.*
javax.*
<others>
org.springframework.*
import static *

See gh-4234