[chore] Validate/set account domain (#619)

* add miekg/dns dependency

* set/validate accountDomain

1 files changed, 26 insertions, 0 deletions

diff --git a/vendor/golang.org/x/net/internal/socket/complete_dontwait.go b/vendor/golang.org/x/net/internal/socket/complete_dontwait.go
new file mode 100644
index 000000000..5b1d50ae7
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/complete_dontwait.go
@@ -0,0 +1,26 @@
+// Copyright 2021 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.
+
+//go:build darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris
+// +build darwin dragonfly freebsd linux netbsd openbsd solaris
+
+package socket
+
+import (
+	"syscall"
+)
+
+// ioComplete checks the flags and result of a syscall, to be used as return
+// value in a syscall.RawConn.Read or Write callback.
+func ioComplete(flags int, operr error) bool {
+	if flags&syscall.MSG_DONTWAIT != 0 {
+		// Caller explicitly said don't wait, so always return immediately.
+		return true
+	}
+	if operr == syscall.EAGAIN || operr == syscall.EWOULDBLOCK {
+		// No data available, block for I/O and try again.
+		return false
+	}
+	return true
+}