Switch logging service from log.tailscale.io to log.tailscale.com (#14398)

Updates tailscale/corp#23617

Signed-off-by: Joe Tsai <joetsai@digital-static.net>

logtail/api.md

@@ -6,14 +6,14 @@ retrieving, and processing log entries.
 # Overview
 
 HTTP requests are received at the service **base URL**
-[https://log.tailscale.io](https://log.tailscale.io), and return JSON-encoded
+[https://log.tailscale.com](https://log.tailscale.com), and return JSON-encoded
 responses using standard HTTP response codes.
 
 Authorization for the configuration and retrieval APIs is done with a secret
 API key passed as the HTTP basic auth username. Secret keys are generated via
 the web UI at base URL. An example of using basic auth with curl:
 
-    curl -u <log_api_key>: https://log.tailscale.io/collections
+    curl -u <log_api_key>: https://log.tailscale.com/collections
 
 In the future, an HTTP header will allow using MessagePack instead of JSON.
 

logtail/example/logadopt/logadopt.go

@@ -25,7 +25,7 @@ func main() {
 	}
 	log.SetFlags(0)
 
-	req, err := http.NewRequest("POST", "https://log.tailscale.io/instances", strings.NewReader(url.Values{
+	req, err := http.NewRequest("POST", "https://log.tailscale.com/instances", strings.NewReader(url.Values{
 		"collection": []string{*collection},
 		"instances":  []string{*publicID},
 		"adopt":      []string{"true"},

logtail/example/logreprocess/demo.sh

@@ -13,7 +13,7 @@
 #
 # Then generate a LOGTAIL_API_KEY and two test collections by visiting:
 #
-#        https://log.tailscale.io
+#        https://log.tailscale.com
 #
 # Then set the three variables below.
 trap 'rv=$?; [ "$rv" = 0 ] || echo "-- exiting with code $rv"; exit $rv' EXIT

logtail/example/logreprocess/logreprocess.go

@@ -37,7 +37,7 @@ func main() {
 		}()
 	}
 
-	req, err := http.NewRequest("GET", "https://log.tailscale.io/c/"+*collection+"?stream=true", nil)
+	req, err := http.NewRequest("GET", "https://log.tailscale.com/c/"+*collection+"?stream=true", nil)
 	if err != nil {
 		log.Fatal(err)
 	}

logtail/logtail.go

@@ -1,7 +1,7 @@
 // Copyright (c) Tailscale Inc & AUTHORS
 // SPDX-License-Identifier: BSD-3-Clause
 
-// Package logtail sends logs to log.tailscale.io.
+// Package logtail sends logs to log.tailscale.com.
 package logtail
 
 import (
@@ -55,7 +55,7 @@ const bufferSize = 4 << 10
 
 // DefaultHost is the default host name to upload logs to when
 // Config.BaseURL isn't provided.
-const DefaultHost = "log.tailscale.io"
+const DefaultHost = "log.tailscale.com"
 
 const defaultFlushDelay = 2 * time.Second
 
@@ -69,7 +69,7 @@ type Config struct {
 	Collection     string          // collection name, a domain name
 	PrivateID      logid.PrivateID // private ID for the primary log stream
 	CopyPrivateID  logid.PrivateID // private ID for a log stream that is a superset of this log stream
-	BaseURL        string          // if empty defaults to "https://log.tailscale.io"
+	BaseURL        string          // if empty defaults to "https://log.tailscale.com"
 	HTTPC          *http.Client    // if empty defaults to http.DefaultClient
 	SkipClientTime bool            // if true, client_time is not written to logs
 	LowMemory      bool            // if true, logtail minimizes memory use
@@ -507,7 +507,7 @@ func (l *Logger) upload(ctx context.Context, body []byte, origlen int) (retryAft
 	}
 	if runtime.GOOS == "js" {
 		// We once advertised we'd accept optional client certs (for internal use)
-		// on log.tailscale.io but then Tailscale SSH js/wasm clients prompted
+		// on log.tailscale.com but then Tailscale SSH js/wasm clients prompted
 		// users (on some browsers?) to pick a client cert. We'll fix the server's
 		// TLS ServerHello, but we can also fix it client side for good measure.
 		//