Update example comments.

tools/examples/adder/adder.go

@@ -2,8 +2,8 @@
 // the process's stdin and stdout.
 //
 // Usage:
-//    $ go build github.com/creachadair/jrpc2/cmd/examples/adder
-//    $ ./adder
+//    go build github.com/creachadair/jrpc2/tools/examples/adder
+//    ./adder
 //
 // Queries to try (copy and paste):
 //    {"jsonrpc":"2.0", "id":1, "method":"Add", "params":[1,2,3]}

tools/examples/client/client.go

@@ -3,10 +3,10 @@
 //
 // Usage (communicates with the server example):
 //
-//   go build github.com/creachadair/jrpc2/cmd/examples/client
+//   go build github.com/creachadair/jrpc2/tools/examples/client
 //   ./client -server :8080
 //
-// See also cmd/examples/server/server.go.
+// See also examples/server/server.go.
 package main
 
 import (

tools/examples/http/server.go

@@ -3,10 +3,10 @@
 //
 // Usage (see also the client example):
 //
-//   go build github.com/creachadair/jrpc2/cmd/examples/http
+//   go build github.com/creachadair/jrpc2/tools/examples/http
 //   ./http -listen :8080
 //
-// The server accepts RPCs on http://localhost:<port>/rpc.
+// The server accepts RPCs on http://<address>/rpc.
 package main
 
 import (

tools/examples/server/server.go

@@ -3,10 +3,10 @@
 //
 // Usage (see also the client example):
 //
-//   go build github.com/creachadair/jrpc2/cmd/examples/server
+//   go build github.com/creachadair/jrpc2/tools/examples/server
 //   ./server -address :8080
 //
-// See also cmd/examples/client/client.go.
+// See also examples/client/client.go.
 package main
 
 import (