rename 9p client to ollie-9p

Avoids shadowing plan9port. Binary auto-discovers server and
identity without flags.

cmd/ollie-9p/main.go

@@ -1,9 +1,9 @@
-// Command 9p is a complete 9P client for interacting with olliesrv.
-// It replaces plan9port's 9p command with no external dependencies.
+// Command ollie-9p is a 9P client for interacting with olliesrv.
+// Auto-discovers the server via $NAMESPACE and identity via $OLLIE_UNAME.
 //
 // Usage:
 //
-//	9p [-a addr] [-A aname] [-n] cmd args...
+//	ollie-9p [-a addr] cmd args...
 //
 // Commands:
 //
@@ -31,18 +31,17 @@ import (
 )
 
 var (
-	addr   = flag.String("a", "", "server address (default: unix!$ns/ollie)")
-	noauth = flag.Bool("n", false, "no authentication")
+	addr = flag.String("a", "", "server address (default: unix!$NAMESPACE/ollie)")
 )
 
 func usage() {
-	fmt.Fprintf(os.Stderr, "usage: 9p [-a addr] [-A aname] [-n] cmd args...\n")
+	fmt.Fprintf(os.Stderr, "usage: ollie-9p [-a addr] cmd args...\n")
 	fmt.Fprintf(os.Stderr, "commands: read write rdwr stat ls create remove mkdir\n")
 	os.Exit(1)
 }
 
 func fatalf(format string, args ...any) {
-	fmt.Fprintf(os.Stderr, "9p: "+format+"\n", args...)
+	fmt.Fprintf(os.Stderr, "ollie-9p: "+format+"\n", args...)
 	os.Exit(1)
 }
 
@@ -59,39 +58,39 @@ func main() {
 	switch cmd {
 	case "read":
 		if len(args) != 1 {
-			fatalf("usage: 9p read path")
+			fatalf("usage: ollie-9p read path")
 		}
 		cmdRead(args[0])
 	case "write":
 		if len(args) != 1 {
-			fatalf("usage: 9p write path")
+			fatalf("usage: ollie-9p write path")
 		}
 		cmdWrite(args[0])
 	case "rdwr":
 		if len(args) != 1 {
-			fatalf("usage: 9p rdwr path")
+			fatalf("usage: ollie-9p rdwr path")
 		}
 		cmdRdwr(args[0])
 	case "stat":
 		if len(args) != 1 {
-			fatalf("usage: 9p stat path")
+			fatalf("usage: ollie-9p stat path")
 		}
 		cmdStat(args[0])
 	case "ls":
 		cmdLs(args)
 	case "create":
 		if len(args) != 1 {
-			fatalf("usage: 9p create path")
+			fatalf("usage: ollie-9p create path")
 		}
 		cmdCreate(args[0])
 	case "remove":
 		if len(args) != 1 {
-			fatalf("usage: 9p remove path")
+			fatalf("usage: ollie-9p remove path")
 		}
 		cmdRemove(args[0])
 	case "mkdir":
 		if len(args) != 1 {
-			fatalf("usage: 9p mkdir path")
+			fatalf("usage: ollie-9p mkdir path")
 		}
 		cmdMkdir(args[0])
 	default: