JAMES-3187 Updates to "Concepts/Storage" section of new documentation

[dleangen]

Updates to the Storage section.

Would be great to get some help with how James handles storage.

Please also comment on any concepts that I have missed, or anything that may not be correct.

Thanks!

[ieugen]

Helllo David,

I like the history lesson. I think we should mark that as History. I believe most of those RFC's are obsolete. I also believe (but did not check) that some RFC's that James implements are obsolete by other RFC's. Especially in the email format.

Regarding your contributions I think we should add it. We can always improve it later. I can help you with more technical docs about the storage part.

Did you check out this information? https://james.apache.org/mailbox/index.html .
We can start by migrating that first and then improve on it.
The sources are here https://git.apache.org/repos/asf?p=james-site.git;a=tree;f=www;h=1c66d9f2f309f030a75a3bb7970c0ed8d6f19638;hb=HEAD .

I know there is this list here that should be migrated: https://james.apache.org/server/rfcs.html .
I would also like to improve it. Make it a table and mention what is implemented in James and from which version.

[dleangen]

Did you check out this information? https://james.apache.org/mailbox/index.html

I do not find it useful, and even if it were useful, it does not belong in this section.

I know there is this list here that should be migrated: https://james.apache.org/server/rfcs.html
I would also like to improve it. Make it a table and mention what is implemented in James and from which version.

I don't mind adding this in some other section, but the list in its current form is not useful.

A list showing which RFCs are actually implemented could be useful, and even more so if it can actually point to the right places in the code.

[dleangen]

Ready for review before merging. Will wait a few days for comments. (Even after merge we can always update at any time.)

[dleangen]

I would like to merge this PR. Please let me know if you have any objections. I will go ahead by tomorrow morning otherwise, as the risk is very low and the text can always be changed.