Update TomcatEmbeddedServletContainerFactory to allow for additional
containers (e.g. SSL or AJP in addition to HTTP).

Fixes gh-528

Before this change the PropertySources loaded from external config
files were just added to the list for resolution in the order that
they were loaded. That worked for simple cases, but when there are
profiles active, and files themselves can activate profiles, it led
to users not being able to change default settings easily (either
on command line or in files, mostly in files).

The solution proposed here is to group PropertySources by profile
and resolve them in order of profile first, and then in order of
the files being loaded.

There are additional shenanigans because the order of the files
being loaded also has to be carefully defined. The rule for users
is that in a list of files to load (e.g. if set via
spring.config.location), the last one wins (natural if you think of
it as a merge of multiple maps). In addition, anything specified
by a user takes precedence over the defaults (which was broken in
some scenarios before).

Additionally, fixes profile ordering in @ConfigurationProperties(path=...)

Fixes gh-483

Fixes gh-541

Fixes gh-462

The new test asserts that a profile defined in one profile can be
switched off in another. Seems to work.

More gh-483

fixex #461

Replace the confusing `spring.profiles.active` `+` syntax with a new
`spring.profiles.include` property.

Fixes gh-483, Fixes gh-534

Fixes gh-532, Fixes gh-506

Spaces -> Tabs, version number, whitespace.

Fixes gh-504

Fixes gh-419

Fixes gh-462

Also added JSON and tweaked properties settings.

Fixes gh-511

Fixes #531

Fixes #530

The most natural order is "more specific locations win". That way
if a use has application.properties in the root of a JAR (as is
normal), overrides can always be made on
classpath:/config/application.properties (as well as
file:./application.properties which has always been the case).

Before this change properties in classpath:/config/* were over
written by those in the root location, not the other way round.

Fixes gh-527

This commit adds a documentation note explaining how to change
the delimiters used to filter maven tokens as these conflict with the
delimiters used by Spring (i.e. ${foo:default}).

Fixes gh-471

Fixes gh-491

* doc-appendix:
  Review of the Appendix

This commit reviews the Appendix of the Spring boot
doc, fixing mostly typos.

Change the initial fix for OSX Java 1.6 compatibility by removing the
need for a direct `tools.jar` dependency.

It appears that `system` dependencies are always pulled in when
used in a Maven plugin. This makes the the dependency on `tools.jar`
particularly brittle since we need to make assumptions about where
the jar is located.

Since the tools jar is *only* needed for Spring Loaded support, the
plugin has now been updated to locate the jar programmatically and
call it via reflection. This should reduce the risk of problems when
using the plugin and at the very least isolate them to Spring Loaded
support.

(See original commit b8c47200)

Fixes gh-497

Fixes gh-525

If user sets addresses it supercedes anything that was set in host
or port (same as in the native ConnectionFactory).

Fixes gh-524

* json-sort-keys:
  Add support for sorting json keys

Add `jsonSortKeys` property to HttpMapperProperties.

Fixes gh-498