Merge #2455

2455: Fix/missing tanslations r=mergify[bot] a=DjVinnii

## What type of PR?

Fix/Enhancement

## What does this PR do?
Add missing Dutch translation, as well as the German translation for `Start of vacation`

### Related issue(s)
- closes #2217

## Prerequisites
Before we can consider review and merge, please make sure the following list is done and checked.
If an entry in not applicable, you can check it or remove it from the list.

- [ ] In case of feature or enhancement: documentation updated accordingly
- [ ] Unless it's docs or a minor change: add [changelog](https://mailu.io/master/contributors/workflow.html#changelog) entry file.


Co-authored-by: Vincent Kling <v.kling@vinniict.nl>
Co-authored-by: Alexander Graf <ghostwheel42@users.noreply.github.com>
Co-authored-by: Dimitri Huisman <diman@huisman.xyz>

core/admin/mailu/translations/de/LC_MESSAGES/messages.po

@@ -32,15 +32,15 @@ msgstr "Anmelden"
 
 #: mailu/sso/templates/base_sso.html:8 mailu/ui/templates/base.html:8
 msgid "Admin page for"
-msgstr ""
+msgstr "Administration für"
 
 #: mailu/sso/templates/base_sso.html:19 mailu/ui/templates/base.html:19
 msgid "toggle sidebar"
-msgstr ""
+msgstr "Seitenleiste ein-/ausklapen"
 
 #: mailu/sso/templates/base_sso.html:37 mailu/ui/templates/base.html:37
 msgid "change language"
-msgstr ""
+msgstr "Sprachauswahl"
 
 #: mailu/sso/templates/sidebar_sso.html:4 mailu/ui/templates/sidebar.html:94
 msgid "Go to"
@@ -53,7 +53,7 @@ msgstr "Client Einrichtung"
 
 #: mailu/sso/templates/sidebar_sso.html:16 mailu/ui/templates/sidebar.html:114
 msgid "Website"
-msgstr "Website"
+msgstr "Webseite"
 
 #: mailu/sso/templates/sidebar_sso.html:22 mailu/ui/templates/sidebar.html:120
 msgid "Help"
@@ -173,7 +173,7 @@ msgstr "Spamfilter aktivieren"
 
 #: mailu/ui/forms.py:103
 msgid "Enable marking spam mails as read"
-msgstr ""
+msgstr "Spam automatisch als gelesen markieren"
 
 #: mailu/ui/forms.py:104
 msgid "Spam filter tolerance"
@@ -218,7 +218,7 @@ msgstr "Text"
 
 #: mailu/ui/forms.py:122
 msgid "Start of vacation"
-msgstr ""
+msgstr "Beginn der Abwesenheit"
 
 #: mailu/ui/forms.py:123
 msgid "End of vacation"
@@ -305,15 +305,15 @@ msgstr "Antispam"
 
 #: mailu/ui/templates/antispam.html:8
 msgid "RSPAMD status page"
-msgstr ""
+msgstr "RSPAMD Statusseite"
 
 #: mailu/ui/templates/client.html:8
 msgid "configure your email client"
-msgstr ""
+msgstr "Informationen zur Einrichtung Ihres Email-Clients"
 
 #: mailu/ui/templates/client.html:13
 msgid "Incoming mail"
-msgstr ""
+msgstr "E-Mail-Empfang"
 
 #: mailu/ui/templates/client.html:16 mailu/ui/templates/client.html:41
 msgid "Mail protocol"
@@ -325,7 +325,7 @@ msgstr "Servername"
 
 #: mailu/ui/templates/client.html:38
 msgid "Outgoing mail"
-msgstr ""
+msgstr "E-Mail-Versand"
 
 #: mailu/ui/templates/confirm.html:4
 msgid "Confirm action"
@@ -348,7 +348,7 @@ msgstr ""
 
 #: mailu/ui/templates/macros.html:129
 msgid "copy to clipboard"
-msgstr ""
+msgstr "In Zwischenablage kopieren"
 
 #: mailu/ui/templates/sidebar.html:15
 msgid "My account"
@@ -531,11 +531,11 @@ msgstr "DNS DMARC Eintrag"
 
 #: mailu/ui/templates/domain/details.html:58
 msgid "DNS TLSA entry"
-msgstr ""
+msgstr "DNS TLSA Eintrag"
 
 #: mailu/ui/templates/domain/details.html:63
 msgid "DNS client auto-configuration entries"
-msgstr ""
+msgstr "DNS Einträge für die automatische Client-Konfiguration"
 
 #: mailu/ui/templates/domain/edit.html:4
 msgid "Edit domain"

core/admin/mailu/translations/nl/LC_MESSAGES/messages.po

@@ -31,15 +31,15 @@ msgstr "Aanmelden"
 
 #: mailu/sso/templates/base_sso.html:8 mailu/ui/templates/base.html:8
 msgid "Admin page for"
-msgstr ""
+msgstr "Admin pagina voor"
 
 #: mailu/sso/templates/base_sso.html:19 mailu/ui/templates/base.html:19
 msgid "toggle sidebar"
-msgstr ""
+msgstr "Zijbalk in/uitklappen"
 
 #: mailu/sso/templates/base_sso.html:37 mailu/ui/templates/base.html:37
 msgid "change language"
-msgstr ""
+msgstr "kies taal"
 
 #: mailu/sso/templates/sidebar_sso.html:4 mailu/ui/templates/sidebar.html:94
 msgid "Go to"
@@ -172,7 +172,7 @@ msgstr "Spamfilter inschakelen"
 
 #: mailu/ui/forms.py:103
 msgid "Enable marking spam mails as read"
-msgstr ""
+msgstr "Markeer spam als gelezen"
 
 #: mailu/ui/forms.py:104
 msgid "Spam filter tolerance"
@@ -217,7 +217,7 @@ msgstr "Antwoord bericht"
 
 #: mailu/ui/forms.py:122
 msgid "Start of vacation"
-msgstr ""
+msgstr "Begin van vakantie"
 
 #: mailu/ui/forms.py:123
 msgid "End of vacation"
@@ -304,15 +304,15 @@ msgstr "Anti-spam"
 
 #: mailu/ui/templates/antispam.html:8
 msgid "RSPAMD status page"
-msgstr ""
+msgstr "RSPAMD status pagina"
 
 #: mailu/ui/templates/client.html:8
 msgid "configure your email client"
-msgstr ""
+msgstr "configureer je email client"
 
 #: mailu/ui/templates/client.html:13
 msgid "Incoming mail"
-msgstr ""
+msgstr "Inkomende mail"
 
 #: mailu/ui/templates/client.html:16 mailu/ui/templates/client.html:41
 msgid "Mail protocol"
@@ -324,7 +324,7 @@ msgstr "Server naam"
 
 #: mailu/ui/templates/client.html:38
 msgid "Outgoing mail"
-msgstr ""
+msgstr "Uitgaande mail"
 
 #: mailu/ui/templates/confirm.html:4
 msgid "Confirm action"
@@ -345,7 +345,7 @@ msgstr "Er is een fout opgetreden tijdens het communiceren met de Docker server.
 
 #: mailu/ui/templates/macros.html:129
 msgid "copy to clipboard"
-msgstr ""
+msgstr "kopieer naar klembord"
 
 #: mailu/ui/templates/sidebar.html:15
 msgid "My account"
@@ -528,11 +528,11 @@ msgstr "DNS DMARC-record"
 
 #: mailu/ui/templates/domain/details.html:58
 msgid "DNS TLSA entry"
-msgstr ""
+msgstr "DNS TLSA-record"
 
 #: mailu/ui/templates/domain/details.html:63
 msgid "DNS client auto-configuration entries"
-msgstr ""
+msgstr "DNS client auto-configuratie records"
 
 #: mailu/ui/templates/domain/edit.html:4
 msgid "Edit domain"