Ask for permission to connect to relays

[staab]

nostr:nevent1qqszceqdtteqgm8xj6r0u4ly82grs6mzmwdtq3mk4lzzp2jus8vju9qpz3mhxue69uhhyetvv9ujuerpd46hxtnfdu90gza2

It would be good to only connect to relays the user wants to connect to, especially since relays in url parameters could result in malicious phishing-style attacks. Keep a list of approvals, and allow users to opt in to "dangerous mode" by auto-approving.