Apply commits:
   stack.erp5: Drop unneeded executable permissions. (fe7ea950)
   stack.logrotate: Fix support for stopped processes.
   stack.erp5: Use an iterator to produce port numbers.
   software/erp5: if wendelin-core-zblk-fmt is not given, then use wendelin.core's default.
   software/erp5 & stack/erp5: Add a new parameter wendelin-core-zblk-fmt.