Bug 36072: opac-request-article should check syspref

Note: This is handled now just like opac-reserve.

Test plan:
Disable ArticleRequests and hit the page.

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
(cherry picked from commit 8afcbe0bbb556cb19ff2e33e56cf3bcb8dd13d11)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
(cherry picked from commit c4d3486511)
Signed-off-by: Frédéric Demians <f.demians@tamil.fr>

opac/opac-request-article.pl

@@ -33,6 +33,12 @@ use Try::Tiny;
 
 my $cgi = CGI->new;
 
+# If ArticleRequests is disabled, leave immediately
+if ( !C4::Context->preference('ArticleRequests') ) {
+    print $cgi->redirect("/cgi-bin/koha/errors/404.pl");
+    exit;
+}
+
 my ( $template, $borrowernumber, $cookie ) = get_template_and_user(
     {
         template_name   => "opac-request-article.tt",