doc: add a manual way to download the list of scripts, if needed (FAQ)

doc/de/weechat_faq.de.adoc

@@ -895,6 +895,23 @@ And update scripts again in WeeChat:
 /script update
 ----
 
+If you still have an error, then you must remove the automatic update of file
+in WeeChat and download the file manually outside WeeChat (that means you'll
+have to update manually the file yourself to get updates):
+
+* in WeeChat:
+
+----
+/set script.scripts.cache_expire -1
+----
+
+* in your shell, with curl installed:
+
+----
+$ cd ~/.weechat/script
+$ curl -O https://weechat.org/files/plugins.xml.gz
+----
+
 [[settings]]
 == Einstellungen
 

doc/en/weechat_faq.en.adoc

@@ -846,6 +846,23 @@ And update scripts again in WeeChat:
 /script update
 ----
 
+If you still have an error, then you must remove the automatic update of file
+in WeeChat and download the file manually outside WeeChat (that means you'll
+have to update manually the file yourself to get updates):
+
+* in WeeChat:
+
+----
+/set script.scripts.cache_expire -1
+----
+
+* in your shell, with curl installed:
+
+----
+$ cd ~/.weechat/script
+$ curl -O https://weechat.org/files/plugins.xml.gz
+----
+
 [[settings]]
 == Settings
 

doc/fr/weechat_faq.fr.adoc

@@ -882,6 +882,24 @@ Et mettez à jour les scripts à nouveau dans WeeChat :
 /script update
 ----
 
+Si vous avez toujours une erreur, alors vous devez supprimer la mise à jour
+automatique du fichier dans WeeChat et télécharger le fichier manuellement
+en dehors de WeeChat (cela signifie que vous devrez mettre à jour le fichier
+vous-même pour obtenir les mises à jour) :
+
+* dans WeeChat :
+
+----
+/set script.scripts.cache_expire -1
+----
+
+* dans votre shell, avec curl installé :
+
+----
+$ cd ~/.weechat/script
+$ curl -O https://weechat.org/files/plugins.xml.gz
+----
+
 [[settings]]
 == Réglages
 

doc/it/weechat_faq.it.adoc

@@ -909,6 +909,23 @@ And update scripts again in WeeChat:
 /script update
 ----
 
+If you still have an error, then you must remove the automatic update of file
+in WeeChat and download the file manually outside WeeChat (that means you'll
+have to update manually the file yourself to get updates):
+
+* in WeeChat:
+
+----
+/set script.scripts.cache_expire -1
+----
+
+* in your shell, with curl installed:
+
+----
+$ cd ~/.weechat/script
+$ curl -O https://weechat.org/files/plugins.xml.gz
+----
+
 [[settings]]
 == Impostazioni
 

doc/ja/weechat_faq.ja.adoc

@@ -843,6 +843,23 @@ And update scripts again in WeeChat:
 /script update
 ----
 
+If you still have an error, then you must remove the automatic update of file
+in WeeChat and download the file manually outside WeeChat (that means you'll
+have to update manually the file yourself to get updates):
+
+* in WeeChat:
+
+----
+/set script.scripts.cache_expire -1
+----
+
+* in your shell, with curl installed:
+
+----
+$ cd ~/.weechat/script
+$ curl -O https://weechat.org/files/plugins.xml.gz
+----
+
 [[settings]]
 == 設定
 

doc/pl/weechat_faq.pl.adoc

@@ -855,6 +855,23 @@ And update scripts again in WeeChat:
 /script update
 ----
 
+If you still have an error, then you must remove the automatic update of file
+in WeeChat and download the file manually outside WeeChat (that means you'll
+have to update manually the file yourself to get updates):
+
+* in WeeChat:
+
+----
+/set script.scripts.cache_expire -1
+----
+
+* in your shell, with curl installed:
+
+----
+$ cd ~/.weechat/script
+$ curl -O https://weechat.org/files/plugins.xml.gz
+----
+
 [[settings]]
 == Ustawienia