Solr taxonomy page displays search form and blocks when the user has no access to the seach

Wow, was that function broken.

* $title undefined
* allowed access to $tids that the user may not have access to
* calls drupal_add_feed twice if it calls back to taxonomy_term_page
* uses search_help('search#noresults', drupal_help_arg()) instead of variable_get('apachesolr_search_noresults', apachesolr_search_noresults())
* and, as noted here, doesn't check user_access('search content')

Synced this function better with taxonomy_term_page

Same patch applies to 6.x-2.x

Patch for 7. Note that D7 doesn't fail back to taxonomy_term_page. It also doesn't have the check:

in_array('im_vid_' . $term->vid, apachesolr_get_enabled_facets('apachesolr_search'))

Updated D6 to set breadcrumb as in taxonomy_term_page.

Merging #716104: Taxonomy hijack should fall back if SOLR is not present into this. Fixed watchdog error to be more descriptive, too.

Hopefully this will also fix #937398: Taxonomy Solr page: WSOD if no content has been indexed yet.

One thing I did find, if using PHP 5.3 you'll get a strict warning on the taxonomy page. This problem actually exists in the taxonomy module too, but can be fixed by initializing the $current object before using it:

<?php
// ...
// Build breadcrumb based on first hierarchy of first term:
$current = new stdClass();
$current->tid = $tids[0];
// ...
?>

I've rerolled the patch with that one change but otherwise the patch looks good to me.

committed to 6.x-1.x and 6.x-2.x

not sure if some of the changes need to made also for 7.x.

See #5 :)

Committing this for 7 - a couple minor tweaks.