Currently, the documented icon parameter to the waypoint directive is not used. This patch fixes that, and fixes some related problems in the KML output.
> That patch looks pretty awesome, thanks for your work on it. I don't have time to test it now, but if it works, I am all for its inclusion. --[[anarcat]]
+
+> + my $tag = $params{'tag'};
+>
+> Please check indentation: you're mixing spaces and hard tabs, apparently
+> with the assumption that a tab is worth 4 spaces.
+>
+> - my $icon = $config{'osm_default_icon'} || "ikiwiki/images/osm.png"; # sanitized: we trust $config
+> + my $icon = $params{'icon'}; # sanitized: we trust $config
+>
+> So there's a comment there that explains why the value of `$icon` can
+> be trusted, but it is no longer true, because it no longer comes from
+> `$config`. This does not fill me with confidence. Maybe it's OK to use
+> a wiki-editor-supplied icon, maybe not. If it is OK, please justify why,
+> and in any case, please do not leave old comments if they are no longer
+> true.
+>
+> In this case I suspect editors may be able to specify an icon whose URL is
+> `javascript:alert("cross-site scripting!")` (or something more malicious)
+> and have it written into the KML as-is. The osm plugin has had cross-site
+> scripting vulnerabilities before, I don't want to add another.
+>
+> + externalGraphic: "${icon}"
+>
+> I don't think Perl variable interpolation is going to work in Javascript?
+> I suspect this should have been inserting something into the GeoJSON instead?
+>
+> --[[smcv]]
+
+>> I have now fixed the indentation issues.
+>>
+>> I have changed the comment relating to the icon parameter, but I don't
+>> really understand how ikiwiki handles sanitisation, so I have not changed
+>> anything else for this.
+>>
+>> As for the Perl variable interpolation, see this
+>> [documentation](http://docs.openlayers.org/library/feature_styling.html#attribute-replacement-syntax).
+>>
+>> -- [[cbaines]]