doc: add link to Archlinux wiki page about core dump files (user's guide)

doc/de/weechat_user.de.adoc

@@ -464,6 +464,12 @@ entprechende <<core_files,Option aktiviert sein>>.
 Diese Core-Datei wird in dem Verzeichnis erzeugt aus welchem WeeChat gestartet wurde
 (dies ist *nicht* das Verzeichnis in welchem sich WeeChat befindet!).
 
+// TRANSLATION MISSING
+[NOTE]
+On some systems like Archlinux, core dumps could be in another directory like
+_/var/lib/systemd/coredump_ and you must use the command `coredumpctl` to read it. +
+For more information, see this wiki page: https://wiki.archlinux.org/index.php/Core_dump
+
 Beispiel: _weechat_ ist in _/usr/bin/_ installiert und die _core_ Datei befindet sich
 in _/home/xxx/_. Nun wird gdb mit folgendem Befehl aufgerufen:
 

doc/en/weechat_user.en.adoc

@@ -455,6 +455,11 @@ When WeeChat crashes, your system will create a file _core_ or _core.12345_
 This file is created in directory where you have run WeeChat (this is *not*
 directory where WeeChat is installed!).
 
+[NOTE]
+On some systems like Archlinux, core dumps could be in another directory like
+_/var/lib/systemd/coredump_ and you must use the command `coredumpctl` to read it. +
+For more information, see this wiki page: https://wiki.archlinux.org/index.php/Core_dump
+
 For example if _weechat_ is installed in _/usr/bin/_ and _core_ file is
 in _/home/xxx/_, then run gdb with this command:
 

doc/fr/weechat_user.fr.adoc

@@ -466,6 +466,12 @@ si <<core_files,l'option est activée>>.
 Ce fichier est créé dans le répertoire où vous avez lancé WeeChat (ce n'est
 *pas* le répertoire où WeeChat est installé !).
 
+[NOTE]
+Sur certains systèmes comme Archlinux, les fichiers _core_ sont dans un autre
+répertoire tel que _/var/lib/systemd/coredump_ et vous devez utiliser la commande
+`coredumpctl` pour le lire. +
+Pour plus d'informations, voir cette page wiki : https://wiki.archlinux.org/index.php/Core_dump
+
 Par exemple si _weechat_ est installé dans _/usr/bin/_ et que le fichier
 _core_ est dans _/home/xxx/_, alors lancez gdb avec cette commande :
 

doc/it/weechat_user.it.adoc

@@ -509,6 +509,12 @@ When WeeChat crashes, your system will create a file _core_ or _core.12345_
 Questo file viene creato nella directory in cui è in esecuzione WeeChat (e
 *non* la directory dove WeeChat è installato!).
 
+// TRANSLATION MISSING
+[NOTE]
+On some systems like Archlinux, core dumps could be in another directory like
+_/var/lib/systemd/coredump_ and you must use the command `coredumpctl` to read it. +
+For more information, see this wiki page: https://wiki.archlinux.org/index.php/Core_dump
+
 Ad esempio, se _weechat_ è installato in _/usr/bin/_ ed il file _core_
 si trova in _/home/xxx/_, allora eseguire gdb con questo comando:
 

doc/ja/weechat_user.ja.adoc

@@ -472,6 +472,12 @@ _core_ または _core.12345_ ファイルを作ります (_12345_
 はプロセス番号です)。このファイルは WeeChat を起動したディレクトリに作られます (これは
 WeeChat がインストールされているディレクトリでは *ありません*!)。
 
+// TRANSLATION MISSING
+[NOTE]
+On some systems like Archlinux, core dumps could be in another directory like
+_/var/lib/systemd/coredump_ and you must use the command `coredumpctl` to read it. +
+For more information, see this wiki page: https://wiki.archlinux.org/index.php/Core_dump
+
 例えば、_weechat_ が _/usr/bin/_ にインストールされ、_core_ ファイルが
 _/home/xxx/_ にある場合、以下のコマンドで gdb を起動してください:
 

doc/pl/weechat_user.pl.adoc

@@ -461,6 +461,12 @@ Kiedy WeeChat ulegnie awarii, Twój system stworzy plik _core_ lub _core.12345_
 Plik ten zostanie utworzony w katalogu, z którego uruchomiono WeeChat (*nie*
 jest to katalog, gdzie zainstalowano WeeChat!).
 
+// TRANSLATION MISSING
+[NOTE]
+On some systems like Archlinux, core dumps could be in another directory like
+_/var/lib/systemd/coredump_ and you must use the command `coredumpctl` to read it. +
+For more information, see this wiki page: https://wiki.archlinux.org/index.php/Core_dump
+
 Na przykład jeśli _weechat_ jest zainstalowany w _/usr/bin/_ i plik _core_
 znajduje się w _/home/xxx/_, uruchom gdb za pomocą tej komendy: