v3.24.0

• OTP-20 unicode support and OTP-21 readiness
• Correctly construct HEART_COMMAND and run_erl arguments
• Only print lines for os var that are set
• Pass prefix through
• Add boot_var ERTS_LIB_DIR to relx_get_nodename
• win32 cross release on unix and vs
• [windows] pass extra arguments from vm.args to service
• vm.args check for name/sname parameter
• disabling progress reports during erl root check in extended start sc…
• Start top-level applications as early as possible.
• PIPE_DIR handling
• Prevent .erlang from prepending string to the erl root dir
• Don't fail status script command if empty