Feature request: Multi-algo and/or Algo switching
Would it be possible to incorporate the ability to support multiple algos at the same time? I've read the Stratum_ext.md, but I'm not sure if this is included. Also, I think Algo-switching might require another parameter is sent to the pool: `algo_perf` (an array of various hashrates for the various algorithyms)
E.g.:
```
 "algo_perf": {
  "cn/2": 2500,
  "cn/1": 2700,
  "cn-fast": 5150,
  "cn-lite": 5400,
  "cn-heavy": 2250
 },
```