Change the default setting of supported_remote_images

sphinx/builders/__init__.py

@@ -64,7 +64,7 @@ class Builder(object):
     #: The list of MIME types of image formats supported by the builder.
     #: Image files are searched in the order in which they appear here.
     supported_image_types = []  # type: List[unicode]
-    supported_remote_images = True
+    supported_remote_images = False
     supported_data_uri_images = False
 
     def __init__(self, app):

sphinx/builders/epub.py

@@ -119,6 +119,7 @@ class EpubBuilder(StandaloneHTMLBuilder):
     copysource = False
     supported_image_types = ['image/svg+xml', 'image/png', 'image/gif',
                              'image/jpeg']
+    supported_remote_images = False
 
     # don't add links
     add_permalinks = False

sphinx/builders/epub3.py

@@ -58,6 +58,7 @@ class Epub3Builder(EpubBuilder):
     """
     name = 'epub'
 
+    supported_remote_images = False
     template_dir = path.join(package_dir, 'templates', 'epub3')
     doctype = DOCTYPE
 

sphinx/builders/html.py

@@ -103,6 +103,7 @@ class StandaloneHTMLBuilder(Builder):
     html_scaled_image_link = True
     supported_image_types = ['image/svg+xml', 'image/png',
                              'image/gif', 'image/jpeg']
+    supported_remote_images = True
     supported_data_uri_images = True
     searchindex_filename = 'searchindex.js'
     add_permalinks = True