Extra kernel opts are separated by ---, not -- in MAAS

[Marius Žalinauskas]

compose_kernel_command_line() in maas/src/provisioningserver/kernel_opts.py clearly states that extra kernel options are separated by --- and not --.

As get_extra_kernel_parameters() in CentOS Curtin hooks use --, any extra kernel option MAAS passes does not get in to GRUB configuration.

[Jacopo Rota (r00ta)]

I see the comment states

```

def get_curtin_kernel_cmdline_sep():
    """Return the separator for passing extra parameters to the kernel."""
    return getattr(
        curtin, CURTIN_KERNEL_CMDLINE_NAME, '--')

...
...
    cmdline_sep = get_curtin_kernel_cmdline_sep()
    if params.extra_opts:
        # Using --- before extra opts makes both d-i and Curtin install
        # them into the grub config when installing an OS, thus causing
        # the options to "stick" when local booting later.
        # see LP: #1402042 for info on '---' versus '--'
```

We should be good. Feel free to reopen in case I misunderstood this bug

[Launchpad Janitor (janitor)]

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