Custom URL validators for more fields

InvenTree/build/migrations/0006_auto_20190913_1407.py

@@ -0,0 +1,19 @@
+# Generated by Django 2.2.5 on 2019-09-13 14:07
+
+import InvenTree.fields
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('build', '0005_auto_20190604_2217'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='build',
+            name='URL',
+            field=InvenTree.fields.InvenTreeURLField(blank=True, help_text='Link to external URL'),
+        ),
+    ]