Merge pull request #10149 from hashicorp/dnephin/config-use-streaming-backend-defualt-true

config: default UseStreamingBackend to true

.changelog/10149.txt

@@ -0,0 +1,3 @@
+```release-note:improvement
+streaming: change `use_streaming_backend` to default to true so that streaming is used by default when it is supported.
+```

agent/config/builder.go

@@ -1102,7 +1102,7 @@ func (b *builder) Build() (rt RuntimeConfig, err error) {
 		Watches:                     c.Watches,
 	}
 
-	rt.UseStreamingBackend = boolVal(c.UseStreamingBackend)
+	rt.UseStreamingBackend = boolValWithDefault(c.UseStreamingBackend, true)
 
 	if rt.Cache.EntryFetchMaxBurst <= 0 {
 		return RuntimeConfig{}, fmt.Errorf("cache.entry_fetch_max_burst must be strictly positive, was: %v", rt.Cache.EntryFetchMaxBurst)

website/content/docs/agent/options.mdx

@@ -2208,14 +2208,10 @@ bind_addr = "{{ GetPrivateInterfaces | include \"network\" \"10.0.0.0/8\" | attr
     currently only supports numeric IDs.
   - `mode` - The permission bits to set on the file.
 
-- `use_streaming_backend` (experimental) when enabled Consul client agents will use
+- `use_streaming_backend` defaults to true. When enabled Consul client agents will use
   streaming rpc, instead of the traditional blocking queries, for endpoints which support
   streaming. All servers must have [`rpc.enable_streaming`](#rpc_enable_streaming)
   enabled before any client can enable `use_streaming_backend`.
-  At least one of [`dns_config.use_cache`](#dns_use_cache) or
-  [`http_config.use_cache`](#http_config_use_cache) must be enabled, otherwise
-  this setting has no effect.
-  `use_streaming_backend` will default to true in a future version of Consul.
 
 - `verify_incoming` - If set to true, Consul
   requires that all incoming connections make use of TLS and that the client