Change session duration for proxyAuth

[mehdi]

I have recently had to re-authentify to a bunch of apps that are behind proxyAuth, which in my opinion is quite annoying, especially with 2FA. I don't think there is a way to change the duration of the auth cookie. I think by default it should be infinite, or at least configurable to be infinite.

[girish]

It should at least match the expiry of the main login session which is 1 year. Let me check.

[girish]

OK, I have fixed the expiry.