docs: make docs-sync

docs/Single-server-VictoriaMetrics.md

@@ -1018,6 +1018,7 @@ Consider setting the following command-line flags:
   with [HTTP Basic Authentication](https://en.wikipedia.org/wiki/Basic_access_authentication).
 * `-deleteAuthKey` for protecting `/api/v1/admin/tsdb/delete_series` endpoint. See [how to delete time series](#how-to-delete-time-series).
 * `-snapshotAuthKey` for protecting `/snapshot*` endpoints. See [how to work with snapshots](#how-to-work-with-snapshots).
+* `-forceMergeAuthKey` for protecting `/internal/force_merge` endpoint. See [force merge docs](#forced-merge).
 * `-search.resetCacheAuthKey` for protecting `/internal/resetRollupResultCache` endpoint. See [backfilling](#backfilling) for more details.
 
 Explicitly set internal network interface for TCP and UDP ports for data ingestion with Graphite and OpenTSDB formats.

docs/vmagent.md

@@ -135,7 +135,7 @@ The following scrape types in [scrape_config](https://prometheus.io/docs/prometh
   See [kubernetes_sd_config](https://prometheus.io/docs/prometheus/latest/configuration/configuration/#kubernetes_sd_config) for details.
 * `ec2_sd_configs` - for scraping targets in Amazon EC2.
   See [ec2_sd_config](https://prometheus.io/docs/prometheus/latest/configuration/configuration/#ec2_sd_config) for details.
-  `vmagent` doesn't support `role_arn` config param yet.
+  `vmagent` doesn't support `profile` config param and aws credentials file yet.
 * `gce_sd_configs` - for scraping targets in Google Compute Engine (GCE).
   See [gce_sd_config](https://prometheus.io/docs/prometheus/latest/configuration/configuration/#gce_sd_config) for details.
   `vmagent` provides the following additional functionality for `gce_sd_config`:

docs/vmalert.md

@@ -166,6 +166,8 @@ The shortlist of configuration flags is the following:
     	Optional basic auth password for -datasource.url
   -datasource.basicAuth.username string
     	Optional basic auth username for -datasource.url
+ -datasource.lookback duration
+        Lookback defines how far to look into past when evaluating queries. For example, if datasource.lookback=5m then param "time" with value now()-5m will be added to every query.
   -datasource.tlsCAFile string
     	Optional path to TLS CA file to use for verifying connections to -datasource.url. By default system CA is used
   -datasource.tlsCertFile string