Bug 38494: (QA follow-up) Add comment and extend pref desc

See BZ comment18.

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>

authorities/auth_finder.pl

@@ -72,6 +72,10 @@ if ( $op eq "do_search" ) {
         my $marcflavour = C4::Context->preference('marcflavour');
         my $biblio_tag  = substr( $index, 4, 3 );
         if ( $marcflavour eq 'MARC21' ) {
+
+            # Heading use-main or added entry = 100, 110, 111, 130, 240, 700, 710, 711, 730
+            # Heading use-subject added entry = 600, 610, 611 ...
+            # Heading use-series added entry = 440(?), 800, 810, 811, 830
             my $heading_use_search_field =
                   $biblio_tag =~ /^[127]/ ? 'Heading-use-main-or-added-entry'
                 : $biblio_tag =~ /^6/     ? 'Heading-use-subject-added-entry'

koha-tmpl/intranet-tmpl/prog/en/modules/admin/preferences/authorities.pref

@@ -102,6 +102,7 @@ Authorities:
                   1: Do
                   0: "Don't"
             - consider the intended use of authority records (008/14-16) during cataloging and linking.
+            - "<br/>NOTE: If you enable this preference, 'No attempt to code' in 008/14-16 is excluded from search results too."
 
     Linker:
         -