Merge pull request #12292 from vector-im/t3chguy/usercontent

Get rid of dependence on usercontent.riot.im

.modernizr.json

@@ -18,6 +18,7 @@
     "test/svg/filters",
     "test/css/animations",
     "test/css/filters",
-    "test/network/fetch"
+    "test/network/fetch",
+    "test/iframe/sandbox"
   ]
 }

README.md

@@ -69,15 +69,6 @@ We have put some coarse mitigations into place to try to protect against this
 situation, but it's still not good practice to do it in the first place.  See
 https://github.com/vector-im/riot-web/issues/1977 for more details.
 
-The same applies for end-to-end encrypted content, but since this is decrypted
-on the client, Riot needs a way to supply the decrypted content from a separate
-origin to the one Riot is hosted on. This currently done with a 'cross origin
-renderer' which is a small piece of javascript hosted on a different domain.
-To avoid all Riot installs needing one of these to be set up, riot.im hosts
-one on usercontent.riot.im which is used by default.
-https://github.com/vector-im/riot-web/issues/6173 tracks progress on replacing
-this with something better.
-
 Building From Source
 ====================
 

docs/config.md

@@ -57,11 +57,6 @@ For a good example, see https://riot.im/develop/config.json.
 1. `update_base_url` (electron app only): HTTPS URL to a web server to download
    updates from. This should be the path to the directory containing `macos`
    and `win32` (for update packages, not installer packages).
-1. `cross_origin_renderer_url`: URL to a static HTML page hosting code to help display
-   encrypted file attachments. This MUST be hosted on a completely separate domain to
-   anything else since it is used to isolate the privileges of file attachments to this
-   domain. Default: `https://usercontent.riot.im/v1.html`. This needs to contain v1.html from
-   https://github.com/matrix-org/usercontent/blob/master/v1.html
 1. `piwik`: Analytics can be disabled by setting `piwik: false` or by leaving the piwik config
    option out of your config file. If you want to enable analytics, set `piwik` to be an object
    containing the following properties:
@@ -87,7 +82,7 @@ For a good example, see https://riot.im/develop/config.json.
    default homeserver when signing up or logging in.
 1. `permalinkPrefix`: Used to change the URL that Riot generates permalinks with.
    By default, this is "https://matrix.to" to generate matrix.to (spec) permalinks.
-   Set this to your Riot instance URL if you run an unfederated server (eg: 
+   Set this to your Riot instance URL if you run an unfederated server (eg:
    "https://riot.example.org").
 
 Note that `index.html` also has an og:image meta tag that is set to an image