Update ReverseProxy.Config.Sample README.md, fix links (#2157)

Match readme instructions to the associated appsetting.json file values and fix broken link to HttpClient configuration

samples/ReverseProxy.Config.Sample/README.md

@@ -9,17 +9,17 @@ The configuration shows two routes and two clusters:
   - Routes to cluster "minimalCluster" which has one destination "www.example.com"
 - allRouteProps route
   - Which includes further restrictions:
-    - Path must be /something/*
+    - Path must be /download/*
     - Host must be localhost, www.aaaaa.com or www.bbbbb.com
     - Http Method must be GET or POST
     - Must have a header "MyCustomHeader" with a value of "value1", "value2" or "another value"
     - A "MyHeader" header will be added with the value "MyValue"
     - Must have a query parameter "MyQueryParameter" with a value of "value1", "value2" or "another value"
-  - This will route to cluster "allClusterProps" which has 2 destinations - https://www.microsoft.com and https://10.20.30.40 
+  - This will route to cluster "allClusterProps" which has 2 destinations - https://dotnet.microsoft.com and https://10.20.30.40 
     - Requests will be [load balanced](https://microsoft.github.io/reverse-proxy/articles/load-balancing.html) between destinations using a "PowerOfTwoChoices" algorithm, which picks two destinations at random, then uses the least loaded of the two.
     - It includes [session affinity](https://microsoft.github.io/reverse-proxy/articles/session-affinity.html) using a cookie which will ensure subsequent requests from the same client go to the same host.
     - It is configured to have both active and passive [health checks](https://microsoft.github.io/reverse-proxy/articles/dests-health-checks.html) - note the second destination will timeout for active checks (unless you have a host with that IP on your network)
-    - It includes [HttpClient configuration](https://microsoft.github.io/reverse-proxy/articles/proxyhttpclientconfig.html) setting outbound connection properties
+    - It includes [HttpClient configuration](https://microsoft.github.io/reverse-proxy/articles/http-client-config.html) setting outbound connection properties
     - HttpRequest properties defaulting to HTTP/2 with a 2min timout
 
 The other files in the sample are the same as the getting started instructions.