416568 Simplified servlet exception logging
416477 Improved consumeAll error handling
416585  WebInfConfiguration examines webapp classloader first instead of its parent when looking for container jars
Merge remote-tracking branch 'origin/master' into jetty-9.1

Conflicts:
	jetty-server/src/main/java/org/eclipse/jetty/server/HttpInput.java
	jetty-server/src/test/java/org/eclipse/jetty/server/HttpConnectionTest.java
	jetty-servlet/src/main/java/org/eclipse/jetty/servlet/ServletHandler.java
Merge remote-tracking branch 'origin/master' into jetty-9.1