Complicating http_host parameter was obsoleted.

Instead, the new wwsympa_url_local parameter may be used to specify upstream URL.

src/lib/Sympa/ConfDef.pm

@@ -1377,10 +1377,9 @@ our @params = (
         'gettext_comment' =>
             'This is used to construct URLs of web interface.',
     },
-    {   'name'       => 'http_host',
+    {   'name'       => 'wwsympa_url_local',
         'gettext_id' => 'URL prefix of WWSympa behind proxy',
         'vhost'      => '1',
-        'file'       => 'sympa.conf',
         'optional'   => '1',
     },
     {   'name'       => 'static_content_url',
@@ -2223,6 +2222,10 @@ our @params = (
     {   'name'    => 'filesystem_encoding',
         'default' => 'utf-8',
     },
+    {   'name'     => 'http_host',    # ??? - 6.2.54
+        'vhost'    => '1',
+        'optional' => '1',
+    },
 
     #FIXME: Is it currently available?
     {   'name' => 'automatic_list_prefix',

src/lib/Sympa/WWW/FastCGI.pm

@@ -36,11 +36,13 @@ sub new {
     my $self = $class->SUPER::new(@args);
 
     # Determin mail domain (a.k.a. "robot") the request is dispatched.
-    # N.B. As of 6.2.15, the http_host parameter will match with the host name
+    # N.B. As of 6.2.15, the http_host parameter (replaced with
+    # wwsympa_url_local parameter on 6.2.55b) will match with the host name
     # and path locally detected by server.  If remotely detected host name
     # and / or path should be differ, the proxy must adjust them.
     # N.B. As of 6.2.34, wwsympa_url parameter may be optional.
-    my @vars = Sympa::WWW::Tools::get_robot('http_host', 'wwsympa_url');
+    my @vars =
+        Sympa::WWW::Tools::get_robot('wwsympa_url_local', 'wwsympa_url');
     if (@vars) {
         @ENV{qw(ORIG_SCRIPT_NAME ORIG_PATH_INFO)} =
             @ENV{qw(SCRIPT_NAME PATH_INFO)};