Closes gh-2259

Closes gh-2244

 Closes gh-2234

Update WebMvcAutoConfiguration so that the RequestMappingHandlerMapping
bean is @Primary. Prior to this commit a NoUniqueBeanDefinitionException
would be thrown then using the MvcUriComponentsBuilder.

Fixes gh-2237

Closes gh-2215

Closes gh-2199

The various servlet containers that we support vary in the quality
of their diagnostics when ServletContext.addListener fails. To make
problem diagnosis easier, this commit ensures that the toString of the
the listener that was being added is included in the exception that's
thrown when a failure occurs.

Closes gh-2197

Fixes gh-2187

Closes gh-2151

Update LogbackLoggingSystem to protect against a potential null
CodeSource result.

Fixes gh-2149

Health indicator configuration keys have moved from the health.* to the
management.health.* namespace. This commit makes sure that these are
documented properly in 1.1.x as well.

See gh-2118

Fixes gh-2110

Closes gh-2021

Update DEFAULT_SESSION_TIMEOUT to use TimeUnit.MINUTES.toSeconds(30)
rather than TimeUnit.SECONDS.toMinutes(30) which would always return
0.

See gh-2084
(cherry picked from commit b33bbd56)

Update AbstractConfigurableEmbeddedServletContainer to set the default
session timeout to 30 minutes. Also correct Javadoc to specify that
the default is '30 minutes'.

Fixes gh-2084

Add a tip for both the Maven and Gradle "Packaging executable jar and
war files" section referring to the how-to.

Fixes gh-2086

See gh-2080

Partly back port changes from affb202e and 85c95744 to fix the usage
of JMS in the CLI. Restore the integration test using HornetQ and fix the
coordinates of the JMS API.

Fixes gh-2075

Extract some of the common property keys as constants.

Fixes gh-2068

Replace `classpath:db/migrations` with `classpath:db/migrations`.

Fixes gh-2063

SecurityAutoConfiguration, via its import of
AuthenticationManagerConfiguration, requires spring-security-config
to be on the classpath as AuthenticationManagerConfiguration extends
GlobalAuthenticationConfigurerAdapter from spring-security-config.

This commit makes SecurityAutoConfiguration conditional on the
presence of GlobalAuthenticationConfigurerAdapter so that the
auto-configuration will be disabled in its absence rather than causing
an app to fail to start.

Closes gh-2046

See gh-1995

Change the visibility of ErrorPageFilter to public to fix
IllegalAccessException errors on certain servlet containers.

Fixes gh-2026

Use putIfAbsent to ensure atomic creation of lock objects.

Fixes gh-1995

Previously, the host had to have a custom value for the configuration
of the port or credentials (username and password) to take effect. This
meant, for example, that you couldn’t just set the port or just set the
username and password while using the default host.

This commit allows the port or username and password to be configured
without also configuring the host. The default host (localhost) and
port (27017) are retained.

Fixes gh-2008

Closes gh-1989

In a properties file, a backslash is used as an escape character for
the line terminator sequence to allow values to be split across
multiple lines. When a backslash is used elsewhere they're stripped
out of the property's value.

This commit updates .properties-based examples for configuring
server.tomcat.internal-proxies to escape the backslahes so that they
are retained in the property's value at runtime.

See gh-1989

Closes gh-1998

Closes gh-1908

Previously, index.html used absolute paths to load its CSS and
JavaScript. This meant that it had to be deployed to /. This commit
updates the HTML to use relative paths for its CSS and JavaScript,
thereby ensuring that they can be loaded irrespective of the context
path to which the application is deployed.

Closes gh-1988