[FEATURE] Use ACLs and common interface for set file permissions
This enhances the set file permissions script to use ACLs if supported
by the file system and operating system. The advantages are more
flexibility, reliability and faster execution of the script.
This change set also integrates the set file permissions script into
the general command line interface. Thus the file permissions can now
also be set by executing:
./flow3 core:setfilepermissions john _www _www