Add --enable-file-urls (#5917)

Closes https://github.com/yt-dlp/yt-dlp/issues/3675

Authored by: coletdjnz

yt_dlp/options.py

@@ -516,6 +516,11 @@ def create_parser():
         action='store_const', const='::', dest='source_address',
         help='Make all connections via IPv6',
     )
+    network.add_option(
+        '--enable-file-urls', action='store_true',
+        dest='enable_file_urls', default=False,
+        help='Enable file:// URLs. This is disabled by default for security reasons.'
+    )
 
     geo = optparse.OptionGroup(parser, 'Geo-restriction')
     geo.add_option(