Close #6781: gettext Add confvals to customize headers of POT file

* gettext_last_translator
* gettext_language_team

CHANGES

@@ -45,6 +45,8 @@ Features added
   authentication information when doing ``linkcheck`` builds
 * #6872: linkcheck: Handles HTTP 308 Permanent Redirect
 * #6613: html: Wrap section number in span tag
+* #6781: gettext: Add :confval:`gettext_last_translator' and
+  :confval:`gettext_language_team` to customize headers of POT file
 
 Bugs fixed
 ----------

sphinx/builders/gettext.py

@@ -282,6 +282,8 @@ def finish(self) -> None:
             'version': self.config.version,
             'copyright': self.config.copyright,
             'project': self.config.project,
+            'last_translator': self.config.gettext_last_translator,
+            'language_team': self.config.gettext_language_team,
             'ctime': datetime.fromtimestamp(timestamp, ltz).strftime('%Y-%m-%d %H:%M%z'),
             'display_location': self.config.gettext_location,
             'display_uuid': self.config.gettext_uuid,
@@ -311,6 +313,8 @@ def setup(app: Sphinx) -> Dict[str, Any]:
     app.add_config_value('gettext_uuid', False, 'gettext')
     app.add_config_value('gettext_auto_build', True, 'env')
     app.add_config_value('gettext_additional_targets', [], 'env')
+    app.add_config_value('gettext_last_translator', 'FULL NAME <EMAIL@ADDRESS>', 'gettext')
+    app.add_config_value('gettext_language_team', 'LANGUAGE <LL@li.org>', 'gettext')
 
     return {
         'version': 'builtin',

sphinx/templates/gettext/message.pot_t

@@ -10,8 +10,8 @@ msgstr ""
 "Report-Msgid-Bugs-To: \n"
 "POT-Creation-Date: {{ ctime|e }}\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
-"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
-"Language-Team: LANGUAGE <LL@li.org>\n"
+"Last-Translator: {{ last_translator|e }}\n"
+"Language-Team: {{ language_team|e }}\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"