help goes to stdout and exits with 0, remove incorrect versioning fro…

…m help

README.md

@@ -68,13 +68,13 @@ and then visit [localhost:3000](http://localhost:3000/), we should see a directo
   or use https://github.com/jpillora/md-tmpl
     with $ md-tmpl -w README.md -->
 
-<!--tmpl,code=plain:echo "$ chisel --help" && go run main.go --help | cat -->
+<!--tmpl,code=plain:echo "$ chisel --help" && go run main.go --help | sed 's#0.0.0-src (go1\..*)#X.Y.Z#' -->
 ``` plain 
 $ chisel --help
 
   Usage: chisel [command] [--help]
 
-  Version: 0.0.0-src (go1.14.6)
+  Version: X.Y.Z
 
   Commands:
     server - runs chisel in server mode
@@ -87,7 +87,7 @@ $ chisel --help
 <!--/tmpl-->
 
 
-<!--tmpl,code=plain:echo "$ chisel server --help" && go run main.go server --help | cat -->
+<!--tmpl,code=plain:echo "$ chisel server --help" && go run main.go server --help | cat | sed 's#0.0.0-src (go1\..*)#X.Y.Z#' -->
 ``` plain 
 $ chisel server --help
 
@@ -173,7 +173,7 @@ $ chisel server --help
       a SIGHUP to short-circuit the client reconnect timer
 
   Version:
-    0.0.0-src (go1.14.6)
+    X.Y.Z
 
   Read more:
     https://github.com/jpillora/chisel
@@ -182,7 +182,7 @@ $ chisel server --help
 <!--/tmpl-->
 
 
-<!--tmpl,code=plain:echo "$ chisel client --help" && go run main.go client --help | cat -->
+<!--tmpl,code=plain:echo "$ chisel client --help" && go run main.go client --help | sed 's#0.0.0-src (go1\..*)#X.Y.Z#' -->
 ``` plain 
 $ chisel client --help
 
@@ -244,9 +244,12 @@ $ chisel client --help
 
   Options:
 
-    --fingerprint, A *strongly recommended* fingerprint (base64 encoded SHA256)
-    string to perform host-key validation against the server's public key.
-    Fingerprint mismatches will close the connection.
+    --fingerprint, A *strongly recommended* fingerprint string
+    to perform host-key validation against the server's public key.
+	Fingerprint mismatches will close the connection.
+	Fingerprints are generated by hashing the ECDSA public key using
+	SHA256 and encoding the result in base64.
+	Fingerprints must be 44 characters containing a trailing equals (=).
 
     --auth, An optional username and password (client authentication)
     in the form: "<user>:<pass>". These credentials are compared to
@@ -308,7 +311,7 @@ $ chisel client --help
       a SIGHUP to short-circuit the client reconnect timer
 
   Version:
-    0.0.0-src (go1.14.6)
+    X.Y.Z
 
   Read more:
     https://github.com/jpillora/chisel

main.go

@@ -43,7 +43,7 @@ func main() {
 
 	if *version || *v {
 		fmt.Println(chshare.BuildVersion)
-		os.Exit(1)
+		os.Exit(0)
 	}
 
 	args := flag.Args()
@@ -60,8 +60,8 @@ func main() {
 	case "client":
 		client(args)
 	default:
-		fmt.Fprintf(os.Stderr, help)
-		os.Exit(1)
+		fmt.Print(help)
+		os.Exit(0)
 	}
 }
 
@@ -190,7 +190,7 @@ func server(args []string) {
 
 	flags.Usage = func() {
 		fmt.Print(serverHelp)
-		os.Exit(1)
+		os.Exit(0)
 	}
 	flags.Parse(args)
 
@@ -328,9 +328,12 @@ var clientHelp = `
 
   Options:
 
-    --fingerprint, A *strongly recommended* fingerprint (base64 encoded SHA256) string
+    --fingerprint, A *strongly recommended* fingerprint string
     to perform host-key validation against the server's public key.
-    Fingerprint mismatches will close the connection.
+	Fingerprint mismatches will close the connection.
+	Fingerprints are generated by hashing the ECDSA public key using
+	SHA256 and encoding the result in base64.
+	Fingerprints must be 44 characters containing a trailing equals (=).
 
     --auth, An optional username and password (client authentication)
     in the form: "<user>:<pass>". These credentials are compared to
@@ -400,7 +403,7 @@ func client(args []string) {
 	verbose := flags.Bool("v", false, "")
 	flags.Usage = func() {
 		fmt.Print(clientHelp)
-		os.Exit(1)
+		os.Exit(0)
 	}
 	flags.Parse(args)
 	//pull out options, put back remaining args