JDK 8 build fix: now test uses LinkedHashMap to avoid random position of attributes in XML.
Refactored NPN code for the soon-to-arrive ALPN code.
Moved NPN tests to new module spdy-npn-tests, that now is the only module
requiring the -Xbootclasspath configuration for the Maven Surefire Plugin.
Merged branch 'master' into 'jetty-9-alpn'.
Implemented ALPN client-side connection.