Merge branch 'go1.16'

merge go1.16 changes

This includes embedded files for releases (no extra 'data' directory!)
and support for a custom language file directory, allowing one to
customize the text accross the app.

config/config-base.json

@@ -65,7 +65,7 @@
                         ["emby", "Emby"]
                     ],
                     "value": "jellyfin",
-                    "description": "Note: Emby integration works is missing some features, such as Password Resets."
+                    "description": "Note: Emby integration works but is missing some features, such as Password Resets."
                 },
                 "substitute_jellyfin_strings": {
                     "name": "Substitute occurrences of \"Jellyfin\"",
@@ -860,6 +860,14 @@
                     "type": "text",
                     "value": "",
                     "description": "Path to directory containing custom versions of web ui pages. See wiki for more info."
+                },
+                "lang_files": {
+                    "name": "Custom language files directory",
+                    "required": false,
+                    "requires_restart": true,
+                    "type": "text",
+                    "value": "",
+                    "description": "The path to a directory which following the same form as the internal 'lang/' directory. See GitHub for more info."
                 }
             }
         }