Also adds minimal javadoc to classes.

See gh-1435

gh-1641: Fixed instructions for configuring EurekaIntanceConfig in AWS

Fixes gh-1663

* pull1656:
  Separate adding X-ForwardedProto header

Add X-Forwarded-Proto header in Zuul PreDecorationFilter even with X-Forwarded-Host header being absent

This reverts commit 46ee0ce1.

maintain multipart content type for data parts

Fixes gh-1581

As discovered in #1643, using `@Configuration` on a custom configuration with `@FeignClient` is unnecessary and creates extra work for exclusion from a `@ComponentScan`. This updates the docs to make this explicit.

A new version of httpclient introduced by boot changed the behaviour that previously allowed the charset. It now has to be parsed out and passed to the apache `ContentType` object explicitly.

fixes gh-1649

ZuulProperties.ZuulRoute consturctor missing explicitly setting of customSensitiveHeaders boolean

addressing issues/1636 ZuulProperties.ZuulRoute consturctor missing explicitly setting of customSensitiveHeaders boolean when provided with sensitiveHeaders

Remove check that does not apply Formatters to Collections

Hopefully this fixes flaky tests.

* pull1586:
  Adds composed @RequestMapping annotations support

Fixed short circuit condition to correctly detect @RequestMapping shortcuts (@GetMapping, @PostMaping etc.)

Fixes gh-1201

Configure a CompositeRouteLocator by default so it is easier to compose
multiple RouteLocators.

* gzip_decompression:
  Disables httpclient auto decompression of encoded data

Applies only to SimpleHostRoutingFilter.

fixes gh-1480

SpringClientFactory returns null if the class is not aware of IClientConfig.

This change catches the exception when trying the constructor with IClientConfig so classes that aren't aware of IClientConfig can be created.

Fixes gh-1608

fixes gh-1616

Fixes gh-1441