[core] no sleep affected subtitles only with enforced flag

youtube_dlc/options.py

@@ -580,6 +580,10 @@ def parseOpts(overrideArguments=None):
             'Upper bound of a range for randomized sleep before each download '
             '(maximum possible number of seconds to sleep). Must only be used '
             'along with --min-sleep-interval.'))
+    workarounds.add_option(
+        '--sleep-subtitles',
+        dest='sleep_interval_subtitles', action='store_true', default=False,
+        help='Enforce sleep interval on subtitles as well')
 
     verbosity = optparse.OptionGroup(parser, 'Verbosity / Simulation Options')
     verbosity.add_option(