Add non-searchable landuse=farmland preset

This is synonym of landuse=farm and I want to recognize it
but not encourage its further use.

data/presets.yaml

@@ -715,6 +715,9 @@ en:
       landuse/farm: 
         name: Farm
         terms: "<translate with synonyms or related terms for 'Farm', separated by commas>"
+      landuse/farmland: 
+        name: Farmland
+        terms: "<translate with synonyms or related terms for 'Farmland', separated by commas>"
       landuse/farmyard: 
         name: Farmyard
         terms: "<translate with synonyms or related terms for 'Farmyard', separated by commas>"

data/presets/presets.json

@@ -2545,6 +2545,19 @@
         "name": "Farm",
         "icon": "farm"
     },
+    "landuse/farmland": {
+        "geometry": [
+            "point",
+            "area"
+        ],
+        "tags": {
+            "landuse": "farmland"
+        },
+        "terms": [],
+        "name": "Farmland",
+        "icon": "farm",
+        "searchable": false
+    },
     "landuse/farmyard": {
         "geometry": [
             "point",

data/presets/presets/landuse/farmland.json

@@ -0,0 +1,13 @@
+{
+    "geometry": [
+        "point",
+        "area"
+    ],
+    "tags": {
+        "landuse": "farmland"
+    },
+    "terms": [],
+    "name": "Farmland",
+    "icon": "farm",
+    "searchable": false
+}

dist/locales/en.json

@@ -1372,6 +1372,10 @@
                 "name": "Farm",
                 "terms": ""
             },
+            "landuse/farmland": {
+                "name": "Farmland",
+                "terms": ""
+            },
             "landuse/farmyard": {
                 "name": "Farmyard",
                 "terms": ""