Release 1.2 with statistics

[Gunnar Hjalmarsson <gunnar at ringlink.org>]

Ringlink 1.2 has been released, and is available for download.
This release includes a first version of the statistics feature. More
about it below.
Other new features compared to release 1.13:
- Option in "Ring admin" to 'hide' the HTML code URL, i.e. prevent it
  from being editable by the ringmembers.
- A new header, X-Originating-IP, is included in every notification
  email sent from Ringlink.
Statistics
----------
The stats feature is enabled by setting a new variable in rlconfig.pm,
$stats. When enabled, the ring traffic is registered - both generated
and received traffic - and the current stats for a site can be viewed in
"Site admin". For the time being, the feature does not include any
summary stats for all the sites in a ring.
Two important notes, if you choose to enable the stats:
1) To ensure that it will work smooth, run the "Reset stats" routine
   from "Master admin" immediately after enabling the feature.
2) Note that the stats feature means that ring navigation causes an
   increased load on the server. If this is an issue for you (or your
   web hosting provider...), you might prefer not to enable the stats
   after all, or you should at least be extra watchful of how the
   server is affected.
The Ringlink stats feature keeps record of received respective generated
hits during the last 30 days. I have used about the same code for a few
months in a home-made hitcounter, and right now the stats is presented
in the same way as you can see at the bottom of
http://www.ringlink.org/.
I look forward to your feedback. As regards a future overview ring
stats, I'd also appreciate your views on how that could be best
presented.
/ Gunnar