mod_http_oauth2: Reduce authorization code validity time to 2 minutes RFC 6749 states > A maximum authorization code lifetime of 10 minutes is RECOMMENDED. So 15 minutes was way too long. I was thinking 5 minutes at first but since this should generally be instant, I settled on 2 minutes as a large guesstimate on how slow it might be on slow links.

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summary: Remote Roster Management
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Introduction
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This module adds support for [XEP-0321: Remote Roster Management] which
is commonly used to allow components such as transports to modify the
rosters of local users.