Fixes gh-463

* zuul-ignored-patterns:
  If more fine-grained ignoring is needed, you can specify specific patterns to ignore. These patterns are being evaluated at the end of the route location process, which means prefixes should be included in the pattern to warrant a match. Ignored patterns span all services and supersede any other route specification.

If more fine-grained ignoring is needed, you can specify specific patterns to ignore. These patterns are being evaluated at the end of the route location process, which means prefixes should be included in the pattern to warrant a match. Ignored patterns span all services and supersede any other route specification.

 zuul:
  ignoredPatterns: */admin/**
  routes:
    users: /myusers/**

This means that all calls such as "/myusers/101" will be forwarded to "/101" on the "users" service. But calls including "/admin/" will not resolve.

Corrected typo in spelling of registration.

fixes gh-415

* pull434:
  Build query string from context instead of original request

Recreate query string from either getCurrentContext().getRequestQueryParams()
or original request as fallback. This allows to override query string
params in pre filters.

fixes gh-426

* feign-8.6.0:
  Updated feign version to 8.6.0

Remove unfinished sentence

Fix escaping

Fix minor typo in doc

Should be approximateZoneFromHostname instead of approximateZoneFromDomain.

The flag has always been there, it just isn't carried through to the ribbon client configuration
without this change if I understand this change correctly.

Fixes gh-315, fixes gh-423.

Fix grammar issue in doc

fixes https://github.com/spring-cloud-samples/turbine/issues/3

Fixed typo in ignoredServices

This reverts commit 06d4d1e1.

Corrected example of providing Turbine cluster name via instance metadata map

Mark an instance as DOWN when the application context is stopped.