Default value for socket.gethostname() should be str, not bytes

[PierreQuentel]

boltons/boltons/iterutils.py

Lines 1322 to 1332 in 270e974

	def reseed(self):
	import socket
	self.pid = os.getpid()
	self.salt = '-'.join([str(self.pid),
	socket.gethostname() or b'<nohostname>',
	str(time.time()),
	codecs.encode(os.urandom(6),
	'hex_codec').decode('ascii')])
	# that codecs trick is the best/only way to get a bytes to
	# hexbytes in py2/3
	return

If the default value is used, '-'.join([...]) fails because the second item is bytes, not str.