go.crypto: initial code

Manual edits to README.
Moved from main Go repository, deleted Makefiles, ran gofix -r go1rename.

Tested with: go test code.google.com/p/go.crypto/...

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5564059

ssh/common_test.go

@@ -0,0 +1,26 @@
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ssh
+
+import (
+	"testing"
+)
+
+func TestSafeString(t *testing.T) {
+	strings := map[string]string{
+		"\x20\x0d\x0a":  "\x20\x0d\x0a",
+		"flibble":       "flibble",
+		"new\x20line":   "new\x20line",
+		"123456\x07789": "123456 789",
+		"\t\t\x10\r\n":  "\t\t \r\n",
+	}
+
+	for s, expected := range strings {
+		actual := safeString(s)
+		if expected != actual {
+			t.Errorf("expected: %v, actual: %v", []byte(expected), []byte(actual))
+		}
+	}
+}