Temporarily add http fields, until they're back in ECS.

libbeat/_meta/fields.common.yml

@@ -37,3 +37,32 @@
           type: keyword
           description: >
             Error type.
+
+# HTTP field definitions below are temporary, until http makes its way into ECS again.
+# See https://github.com/elastic/ecs/pull/171
+- key: http
+  title: HTTP
+  fields:
+    - name: http.request.method
+      type: keyword
+      description: >
+        http request method.
+      example: get, post, put
+
+    - name: http.response.status_code
+      type: long
+      description: >
+        http response status code.
+      example: 404
+
+    - name: http.response.body
+      type: text
+      description: >
+        the full http response body.
+      example: hello world
+
+    - name: http.version
+      type: keyword
+      description: >
+        http version.
+      example: 1.1