added next and previous vars to index

etherdump/commands/index.py

@@ -80,6 +80,8 @@ def main (args):
     pg.add_argument("--updateFrequency", default=1, type=int, help="rss: update frequency within the update period (where 2 would mean twice per period); default: 1")
     pg.add_argument("--generator", default="https://gitlab.com/activearchives/etherdump", help="generator, default: https://gitlab.com/activearchives/etherdump")
     pg.add_argument("--timestamp", default=None, help="timestamp, default: now (e.g. 2015-12-01 12:30:00)")
+    pg.add_argument("--next", default=None, help="next link, default: None)")
+    pg.add_argument("--prev", default=None, help="prev link, default: None")
 
     args = p.parse_args(args)