On the search pages use the search_location and player_location, in
addition to the base_url, to associate filter and index entries, such
that the filter actually works.
Fix the .index file location for projects with a search_location. As
this is now consistent, we happen to fix a crash that happened when
changing the search_location.
New config option:
deny_bespoke_templates
Indexers may use the "template" attribute in the video node of
an .hmml file to set a bespoke template for that entry,
superseding any configured player_template. Setting
"deny_bespoke_templates" to true prevents this.