420572 IOTest explicitly uses 127.0.0.1
420844 Connection:close on exceptional errors
Merge remote-tracking branch 'origin/master' into jetty-9.1

Conflicts:
	jetty-server/src/test/java/org/eclipse/jetty/server/HttpConnectionTest.java
	jetty-servlet/src/main/java/org/eclipse/jetty/servlet/ServletHandler.java