docs/CHANGELOG.md: cut v1.50.0 release

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Aliaksandr Valialkin 2020-12-15 14:44:42 +02:00
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# tip
# [v1.50.0](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.50.0)
* FEATURE: automatically reset response cache when samples with timestamps older than `now - search.cacheTimestampOffset` are ingested to VictoriaMetrics. This makes unnecessary disabling response cache during data backfilling or resetting it after backfilling is complete as described [in these docs](https://victoriametrics.github.io/#backfilling). This feature applies only to single-node VictoriaMetrics. It doesn't apply to cluster version of VictoriaMetrics because `vminsert` nodes don't know about `vmselect` nodes where the response cache must be reset.
* FEATURE: vmalert: add `query`, `first` and `value` functions to alert templates. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/539
* FEATURE: vmagent: return user-friendly HTML page when requesting `/targets` page from web browser. The page is returned in the old plaintext format when requesting via curl or similar tool.