Example cron tab should be updated with new holds targeter

[Kathy Lussier]

The example cron tab continues to include the information for the old holds targeter. Since the new holds targeter has been available since 2.12, I would suggest that we could replace it with the v2 hold targeter.

[Remington Steed (rjs7)]

While we're updating the example crontab, we may want to add these lines from the example that was posted on the wiki (which I have now removed and pointed at the example in the code base):

# Sitemap Generator - added in 2.7
# 12 2 * * * cd /openils/var/web && $EG_BIN_DIR/sitemap_generator --lib-hostname http://catalog.example.org

For reference, here is the wiki page:

https://wiki.evergreen-ils.org/doku.php?id=evergreen-admin:cron_services

[Bill Erickson (berick)]

See also bug #1745610 re: hold targeter.