<p><b>@zerebubuth</b> commented on this pull request.</p>

<hr>

<p>In <a href="https://github.com/openstreetmap/openstreetmap-website/pull/2383#discussion_r333040618">CONFIGURE.md</a>:</p>
<pre style='color:#555'>> @@ -131,3 +131,5 @@ If you want to deploy The Rails Port for production use, you'll need to make a f
 * The included version of the GPX importer is slow and/or completely inoperable. You should consider using [the high-speed GPX importer](https://git.openstreetmap.org/gpx-import.git/).
 * Make sure you generate the i18n files and precompile the production assets: `RAILS_ENV=production rake i18n:js:export assets:precompile`
 * Make sure the web server user as well as the rails user can read, write and create directories in `tmp/`.
+* If you want to use diff replication then you will need to install the shared library versions of the special SQL functions (see the bottom of [INSTALL.md](INSTALL.md)).
</pre>
<p>To try and avoid confusion, I've changed that line in <a class="commit-link" data-hovercard-type="commit" data-hovercard-url="https://github.com/openstreetmap/openstreetmap-website/commit/7fb5bcaf3f9775ee1de185efb3164a100ecccdc3/hovercard" href="https://github.com/openstreetmap/openstreetmap-website/commit/7fb5bcaf3f9775ee1de185efb3164a100ecccdc3"><tt>7fb5bca</tt></a> to explicitly say there's no pure SQL version of <code>xid_to_int4</code>.</p>

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