Create the option to replace sqlite3 with psql or mysql on installation

[lifeboy]

I believe that if multiple users use roundcube simultaneously with sqlite3 the database will be potentially locked by one user so the others will not get a response. Is that true?

Is it a huge undertaking to replace sqlite3 with either psql or mysql?

I'm thinking of small businesses with a handful of employees who want to the use that and allow users to use webmail.

For reference: https://www.sqlite.org/lockingv3.html
Roundcube seems to only support sqlite3 going forward: https://www.sqlite.org/lockingv3.html

So am I seeing a problem where there isn't one?