Add limit-request-line argument to gunicorn arguments

[Saboti215]

Issue: Feature Request

I often use a frm.call in my application where I want to use the GET method to ensure there are no changes commited to the database. I often ran into the conflicts, that the request uri of a GET request is way to large, because the frm.call passes the whole document to the server. I've got the following error:

Request line too Large (8192 > 4094)

This can be fixed by adding the argument --limit-request-line 0 to the gunicorn arguments in supervisor.conf

I've already added this argument to my machine, but it would be really nice for future projects if this setting will be included in the template bench/config/templates/supervisor.conf