ACCUMULO-4490 Code review updates

* Moved code in config.sh to accumulo script
* Moved non-API scripts to contrib
* Moved setting master goal state to service.sh
* Stopped using ifconfig command as its deprecated
diff --git a/README b/README
index a25acec..7880de7 100644
--- a/README
+++ b/README
@@ -46,7 +46,7 @@
 
 Run the following command.
 
- ./bin/accumulo proxy -p ./opt/proxy/proxy.properties
+ ./bin/accumulo proxy -p ./proxy/proxy.properties
 
 5. Clients