docs: adds instructions for migrating control machines

[ccclxxiii]

pr overview:

• based on conversations in mutual help channel, an operator needed to understand how to migrate from desktop to laptop for their control machine
• it was discovered that it was not clear nor documented on the procedures and likely was not tested
• this pr updates the relay documentation to demonstrate how to migrate the control machine
• the instructions have been tested on a working relay

note to team:

• maddy_chatmail is 404 causing ci to fail on tests, remove it for now.

[adbenitez]

looks good but I didn't know what a "control machine" is maybe add a note "control machine (the computer from where you run the server deployment script and upgrades)" or something like that

[hpk42]

i don't think a full new doc is required for migrating the client machine. It's basically about having to preserve chatmail.ini and www-customizations.

So I think the content could be condensed e.g. into a last new section in https://chatmail.at/doc/relay/getting_started.html

sidenote: i am wondering about the term "control" machine -- but don't yet have better suggestion.

[hpk42]

i don't think a full new doc is required for migrating the client machine. It's basically about having to preserve chatmail.ini and www-customizations.

So I think the content could be condensed e.g. into a last new section in https://chatmail.at/doc/relay/getting_started.html

sidenote: i am wondering about the term "control" machine -- but don't yet have better suggestion.

[ccclxxiii]

i don't think a full new doc is required for migrating the client machine. It's basically about having to preserve chatmail.ini and www-customizations.

So I think the content could be condensed e.g. into a last new section in https://chatmail.at/doc/relay/getting_started.html

i'll look at condensing it.

sidenote: i am wondering about the term "control" machine -- but don't yet have better suggestion.

it's typically a term i've used when i have to orchestrate from a machine to servers. i can adjust it if needed

[ccclxxiii]

@hpk42 change requests are complete. let me know if there's further revisions.

[hpk42]

that looks a bit unrelated -- what is the background of this removal?

[ccclxxiii]

@hpk42 i had mentioned it in the initial overview. the link for github is 404 and it caused ci to fail, so it was removed to push it forward. if you like i can add it back.

[hpk42]

https://github.com/omidz4t/madmail is the new location.

[hpk42]

the madmail project is the official successor of the maddy-plugin approach, so i suggest to add this, while remopving stale maddy-chatmail reference.

[hpk42]

https://github.com/omidz4t/madmail is the new location.