[Update] Session protocol 添加 telnet 选项

apps/terminal/migrations/0015_auto_20190923_1529.py

+# Generated by Django 2.1.7 on 2019-09-23 07:29
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('terminal', '0014_auto_20181226_1441'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='session',
+            name='protocol',
+            field=models.CharField(choices=[('ssh', 'ssh'), ('rdp', 'rdp'), ('vnc', 'vnc'), ('telnet', 'telnet')], default='ssh', max_length=8),
+        ),
+    ]

apps/terminal/models.py

@@ -147,7 +147,8 @@ class Session(OrgModelMixin):
     PROTOCOL_CHOICES = (
         ('ssh', 'ssh'),
         ('rdp', 'rdp'),
-        ('vnc', 'vnc')
+        ('vnc', 'vnc'),
+        ('telnet', 'telnet'),
     )
 
     id = models.UUIDField(default=uuid.uuid4, primary_key=True)