Add '/hydro-power-plants.json'

Query "node", "way" and "relation" elements with "generator:source" and "power:source" equal to "hydro" value:

(node["generator:source"="hydro"];
way["generator:source"="hydro"];
relation["generator:source"="hydro"];
node["plant:source"="hydro"];
way["plant:source"="hydro"];
relation["plant:source"="hydro"];)

hydro-power-plants.json

@@ -0,0 +1,18 @@
+{
+    "type": "overpass",
+    "name": {
+        "en": "Hydro power plants",
+        "de": "Wasserkraftwerke",
+        "fr": "Centrales hydroélectriques"
+    },
+    "query": {
+        "7": [
+            "(node[\"generator:source\"=\"hydro\"];",
+            "way[\"generator:source\"=\"hydro\"];",
+            "relation[\"generator:source\"=\"hydro\"];",
+            "node[\"plant:source\"=\"hydro\"];",
+            "way[\"plant:source\"=\"hydro\"];",
+            "relation[\"plant:source\"=\"hydro\"];)"
+        ]
+    }
+}