Changelog: 1602 fragment

changelog.d/1602-cctv-streetview-fallback-catalog.md

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+- The CCTV Street View fallback serves only catalog cameras, at their catalog
+  position, heading, field of view and pitch, and ignores coordinates a
+  request supplies. It spends from the per-client Google budget
+  (`GEV_RATELIMIT_GOOGLE_PER_MIN`, default 120), so the Google key can no
+  longer be used as an unmetered Street View service (asturksever, #1602).