Possible to add a "--no-color" option?
Thank you for your work!

I have been running p2pool in sethsimmons docker of this repository, as I am running on Unraid.  It appears with Unraid specifically the color codes in the output cause issues (as documented in the XMRig docker), and I was hoping it would be possible to add an option to toggle the colors off for the text output?  I have no idea how difficult this might be.  Otherwise the output just looks like this:  
 ```
[0;36m2021-10-27 01:23:52.0455[0m [0;90mSideChain [0madd_block: height = 474611, id = 2580549ebf9e7d83d4e5aa48b804414f059a6236626f4bcc9b9223a80c600a1b, mainchain height = 2479830, verified = 0[0m
```