GUACAMOLE-1291: Merge Korean language support

extensions/guacamole-auth-duo/src/main/resources/guac-manifest.json

@@ -15,6 +15,7 @@
         "translations/en.json",
         "translations/fr.json",
         "translations/ja.json",
+        "translations/ko.json",
         "translations/pt.json",
         "translations/ru.json",
         "translations/zh.json"

extensions/guacamole-auth-duo/src/main/resources/translations/ko.json

@@ -0,0 +1,8 @@
+{
+
+    "LOGIN" : {
+        "INFO_DUO_VALIDATION_CODE_INCORRECT"    : "Duo 유효성 검사 코드가 잘못되었습니다.",
+        "INFO_DUO_AUTH_REQUIRED"                : "계속하려면 Duo로 인증하세요."
+    }
+
+}