Merge pull request umbraco#2579 from umbraco/nul800sebastiaan-patch-1

Remove usage of unnecessary and problematic terms

.github/valeStyle/Terms.yml

@@ -6,4 +6,10 @@ ignorecase: true
 swap:
   back office: "'backoffice'"
   back-office: "'backoffice'" 
-  app_plugins: "'App_Plugins'"
+  app_plugins: "'App_Plugins'"
+  blacklist: "'deny list'"
+  whitelist: "'allow list'"
+  black list: "'deny list'"
+  white list: "'allow list'"  
+  master: "'primary'"
+  slave: "'secondary'"

Reference/Config/umbracoSettings/index.md

@@ -345,7 +345,7 @@ This setting is used when you're running Umbraco in virtual directories.
 
 **`<DisallowedUploadFiles>`**
 
-This setting consists of a "black list" of file extensions that editors shouldn't be allowed to upload via the backoffice.
+This setting consists of a list of file extensions that editors shouldn't be allowed to upload via the backoffice.
 
 ```xml
 <!-- These file types will not be allowed to be uploaded via the upload control for media and content -->
@@ -354,7 +354,7 @@ This setting consists of a "black list" of file extensions that editors shouldn'
 
 **`<AllowedUploadFiles>`**
 
-If greater control is required than available from the above, this setting can be used to store a "white list" of file extensions.  If provided, only files with these extensions can be uploaded via the backoffice.
+If greater control is required than available from the above, this setting can be used to store a list of file extensions.  If provided, only files with these extensions can be uploaded via the backoffice.
 
 ```xml
 <!-- If completed, only the file extensions listed below will be allowed to be uploaded.  If empty, disallowedUploadFiles will apply to prevent upload of specific file extensions. -->