Stop leaking IB password to IBC log when passed via env vars

[pps83]

TWSUSERID/TWSPASSWORD (or /User:/PW:) ended up in clear in every launch's System Properties dump. Config-file IbLoginId/IbPassword was unaffected.

[pps83]

@rlktradewright ping. current ibc logs password in clear text in its logs if password is passed via env vars

[rlktradewright]

@pps83

I haven't forgotten this, or the raft of other issues you raised. But at the moment I have more important things to do.

Not ideal, I know, but it's been this way for about 23 years and no one has complained about their credentials being compromised becuase of this. Partly because I suspect few users do this, especially as they are warned not to.

I want to do one final release of IBC before I abandon it which will include all this stuff and some other things I've had in the pipeline for a while now. I just need to find some time to do it.