webkitgtk: Fix an issue breaking various Web sites

There is a regression in WebKitGTK-2.42.1 breaking various Web sites.
See the linked bug report and its duplicates.

The fix is a simple change, so apply it as a sed now.

BugLink: https://bugs.webkit.org/show_bug.cgi?id=262777
Link: https://github.com/WebKit/WebKit/commit/c29a26a02441

introduction/welcome/changelog.xml

@@ -41,6 +41,10 @@
     <listitem>
       <para>November 9th, 2023</para>
       <itemizedlist>
+        <listitem>
+          <para>[xry111] - Fix an issue with WebKitGTK-2.42.1 breaking
+          various Web sites.</para>
+        </listitem>
         <listitem>
           <para>[renodr] - Update to libcloudproviders-0.3.5. Fixes
           <ulink url="&blfs-ticket-root;18837">#18837</ulink>.</para>

x/lib/webkitgtk.xml

@@ -144,13 +144,15 @@
     <bridgehead renderas="sect3">Installation of
     <application>WebKitGTK</application></bridgehead>
 
-<!--
+    <!-- https://bugs.webkit.org/show_bug.cgi?id=262777
+         https://github.com/WebKit/WebKit/commit/c29a26a02441 -->
     <para>
-      First, fix a problem when not using BUBBLEWRAP_SANDBOX:
+      First, fix an issue breaking Web sites relying on Javascript Blob API:
     </para>
 
-<screen><userinput>sed -i '39,66 s:^://:' Source/WTF/wtf/glib/Sandbox.cpp</userinput></screen>
--->
+<screen><userinput>sed "/bool BlobURL::isSecureBlobURL/,/^}/                                \
+     s/return false/return SecurityOrigin::isSecure(getOriginURL(url))/" \
+    -i Source/WebCore/fileapi/BlobURL.cpp</userinput></screen>
 
     <important>
       <para>