**New features:**
* [gitlab] Alias `--url` for `--enterprise-url` argument (801)\
The argument `--enterprise-url` for Gitlab backend has the new alias
`--url`. With this argument, users can define the GitLab instance from
items will be fetched. This can be set to the SaaS GitLab
(`gitlab.com`) or to a self-managed instance (e.g.
`gitlab.example.com`). By default, this parameter points to
`https://gitlab.com`.
* [hyperkitty/mbox] Option `to-date` to fetch until that date\
This parameter allows fetching data until a specific date. By default,
this value is `2100-01-01`, but this can be changed adding `--to-
date`.