Rebase private OTA libs on 2.7

libs/ota-http-client/README.md

@@ -0,0 +1,26 @@
+# Implementation of Mongoose OS OTA HTTP client
+
+This library adds a device configuration section called `update`, where
+a device could be configured to poll a specified HTTP URL for a new
+app firmware.
+
+Also, this library adds a C API to fetch a new firmware from the given
+URL and update programmatically.
+
+## Configuration section
+
+The library adds the following object to the device configuration:
+
+
+```javascript
+  "update": {
+    "commit_timeout": 0,        // OTA commit timeout
+    "url": "",                  // HTTP URL to poll
+    "interval": 0,              // Polling interval
+    "ssl_ca_file": "ca.pem",    // TLS CA cert file
+    "ssl_client_cert_file": "", // TLS cert file
+    "ssl_server_name": "",      // TLS server name
+    "enable_post": true
+  }
+```
+