mailbot: record time we refreshed maintainers

We intended to refresh maintainers every 24h but the refresh
time is not updated, so we wait 24h the first time, and then
refresh on every mail fetch (every 2min).

Signed-off-by: Jakub Kicinski <[email protected]>

Author: kuba-moo

mailbot.py

@@ -753,6 +753,8 @@ def main():
             dr.alias_section('submitting-patches', 'submit')
             dr.alias_section('submitting-patches', 'sub')
 
+            doc_load_time = req_time
+
         for t in mail_repos.values():
             check_new(t, pw, dr)