Add support for DragonflyBSD and NetBSD.

This merges all the bsd (including darwin) support into terminal_bsd.go

Cross-compiling works for all of them in that they all compile, but I've only
actually tested the binary on dragonflybsd.  I don't see why this wouldn't
work on the others since I don't think they'd compile if they didn't
support TIOCGETA and Termios, but just a heads up.

terminal_bsd.go

@@ -1,3 +1,5 @@
+// +build darwin freebsd openbsd netbsd dragonfly
+
 package logrus
 
 import "syscall"

terminal_darwin.go

@@ -1,12 +0,0 @@
-// Based on ssh/terminal:
-// Copyright 2013 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 logrus
-
-import "syscall"
-
-const ioctlReadTermios = syscall.TIOCGETA
-
-type Termios syscall.Termios

terminal_freebsd.go

@@ -1,20 +0,0 @@
-/*
-  Go 1.2 doesn't include Termios for FreeBSD. This should be added in 1.3 and this could be merged with terminal_darwin.
-*/
-package logrus
-
-import (
-	"syscall"
-)
-
-const ioctlReadTermios = syscall.TIOCGETA
-
-type Termios struct {
-	Iflag  uint32
-	Oflag  uint32
-	Cflag  uint32
-	Lflag  uint32
-	Cc     [20]uint8
-	Ispeed uint32
-	Ospeed uint32
-}

terminal_notwindows.go

@@ -3,7 +3,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build linux darwin freebsd openbsd
+// +build linux darwin freebsd openbsd netbsd dragonfly
 
 package logrus