mod_invites_page: Change client selection button text from 'Install' to 'Select' by default This also allows specific clients entries to override the text via the 'select_text' field. Rationale: 1) users may already have the software installed, we still want them to select it anyway for the tailored setup experience. 2) some clients (e.g. web clients) are not really "installed" so the text was misleading

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labels:
summary: Report server uptime in presence
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Introduction
============

This module simply responds to a presence probe sent to the server with
a presence staza containing a timestamp from when the server started.

This is imagined as an alternative to the XEP-0012 "Last Activity"
protocol that can seem a bit overloaded.