- anaconda_optparse.py: a new OptionParser that also reads boot args (wwoods)
    - Add flags.set_cmdline_bool and flags.read_cmdline (wwoods)
    - flags.py: add new BootArgs() object for dealing with boot args (wwoods)
    - flags.py: rework/cleanup Flags object (wwoods)
    - fix serial console option parsing (#767745) (wwoods)
    - run convertfs on upgrade (#787893) (bcl)
    - check if stdout and stderr are the same in execWithRedirect and open the file
      only once in such cases (mmatsuya)
    - Disable ipv6 on target system when using noipv6 option (#735791) (rvykydal)