Merge changes I688490ff,I267176cc,Ib0c1b40d,I8e211592,Iec165991 * changes: Unpack JARs for running servers in $site_path/tmp Support serving static/ and Documentation/ from plugins Allow plugins.checkFrequency = 0 to disable scanner Execute plugins from a copy in $site_path/tmp Atomic replace SSH and HTTP bindings during plugin reload