Factor out http-server lib

PUBLISHED_FROM=366ff9952891966d7771e2791304255cfcc87b51

Author: dimonomid

mos.yml

@@ -8,6 +8,7 @@ filesystem:
   - fs
 libs:
     # common mgos libs
+  - origin: https://github.com/mongoose-os-libs/http-server
   - origin: https://github.com/mongoose-os-libs/ota-http-server
   - origin: https://github.com/mongoose-os-libs/rpc-loopback
   - origin: https://github.com/mongoose-os-libs/rpc-mqtt