[KARAF-3362] Align jetty feature version with pax-jetty one
[KARAF-3367]add additional configuration options when use wrapper:install
(cherry picked from commit 72595e366b0d5783ba857183b92e37846ae9b93a)

Conflicts:
	wrapper/src/main/java/org/apache/karaf/wrapper/commands/Install.java
[KARAF-3368] Support reference:file:xxx urls in startup.properties