Merge pull request #944 from N0YB/RELENG_2_1

XHTML Compliance
Fix #3468, wording fix
Fix #3469

Before downloading file to process urltable, there is a random wait
time between 5 and 60 seconds. Because of this, the difference between
file mtime and current time can be less than $freq * 86400 and it'll be
skipped. Add 90 seconds (60 of max random wait + 30 just to be sure) to
avoid skipping a file that should be updated
XHTML Compliance

Traffic Graph Status