disable WARC by default

archivebox/config.py

@@ -23,7 +23,7 @@ FETCH_WGET_REQUISITES =  os.getenv('FETCH_WGET_REQUISITES',  'True'
 FETCH_PDF =              os.getenv('FETCH_PDF',              'True'             ).lower() == 'true'
 FETCH_SCREENSHOT =       os.getenv('FETCH_SCREENSHOT',       'True'             ).lower() == 'true'
 FETCH_DOM =              os.getenv('FETCH_DOM',              'True'             ).lower() == 'true'
-FETCH_WARC =             os.getenv('FETCH_WARC',             'True'             ).lower() == 'true'
+FETCH_WARC =             os.getenv('FETCH_WARC',             'False'            ).lower() == 'true'
 FETCH_GIT =              os.getenv('FETCH_GIT',              'True'             ).lower() == 'true'
 FETCH_MEDIA =            os.getenv('FETCH_MEDIA',            'False'            ).lower() == 'true'
 FETCH_FAVICON =          os.getenv('FETCH_FAVICON',          'True'             ).lower() == 'true'