Add quiet method to Bootstrap to disable printing configuration properties
Jetty Client and Jetty 9
Remove Apache and Netty http clients
Run http client test suite over Jetty with SOCKS

Add TestingSocksProxy
Tighten type bounds for assertInstanceOf

This makes it possible to catch checks for completely unrelated types
at compile time. E.g.,

    assertInstanceOf("foo", Integer.class)

is a compile-time error.