[Merge] ~paelzer/ubuntu-seeds/+git/platform:prepare-to-drop-server-ship into ~ubuntu-core-dev/ubuntu-seeds/+git/platform:groovy

[Christian Ehrhardt ]

Bryce: "I have a few suggestions and questions below, hopefully they are useful."

They are - thanks for the review!


Bryce: "It looks like even with these changes, there are still items left in
server-ship?"

But all bits in server-ship that are left are held in main by other pieces the server team already has. And listing a package multiple times in many places has turned out to be misleading as well.
There was a full scale analysis of this while you were away and is available (for internal viewers) at:
https://docs.google.com/spreadsheets/d/1tm7OeFqGhG4Ox7lomOJNAdFvYMeuudgtPkUU65hzTfw

Done:
- changed: demoted typo fixed
- changed: HA spelled out now
- changed: explained libaio-dev in the commit message
- Explain: Proxy was formerly for haproxy which is more HA than proxy and therefore moved it
- changed: I reintroduced Proxy: for squid
- changed: mentioned the two old LP bugs for squid as a comment in the seed
- explain: php-recode was already cleaned up in a later commit
- explain: the rest of the php things in main are pulled in by these or by the packages in the lamp task
- explain: dovecot-[pop3d|imapd] are already in the mail-server task and not listed again intentionally (duplication)
- explain: I already added another subcategory later "Log parsing and status gathering" where aide/checksecurity fit well
- changed: retained the LP: #1700826 info for numactl
- explain: yes the plan is to also remove "ship" (and the no more used boot and d-i-requirements then)
- explain: yes I grouped the full ppp stack until we can get rid of it in one place
- changed: mentioned that libpam-cracklib is already in supported-sysadmin-common
- changed: "misc" is gone now (and my garage is more organized). "Hardware related" is good for now
- changed: fixed refrence to community-maas seed
- changed: fixed impi -> ipmi typo (you didn't ask, but now that I've seen it)
- explain: radvd is special as it stays with openstack AND us eventually. The first change is the retain only intentionally
- changed: added an explanation why the openstack move was done with some duplication
- changed: fixed typo "updateam"

Thank you so much Bryce.

Once you have time again you can revisit both MPs and set them to approved if you are ok now.
I could then land that (on a Monday) and sort out (if any) unexpected promotions/demotions throughout the week.
-- 
https://code.launchpad.net/~paelzer/ubuntu-seeds/+git/platform/+merge/389947
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