add logging in pythonw env and fix connection drops with it

[razuz]

Long debugged error which caused much misery :)

Anyways stderr (and also stdout) needs some sort of env which is set to None in pythonw.exe ... this however causes weird anomalies while talking to agent :/

This is one solution to fix this issue - there are probably more ways to handle that but as far as I tested then this works.

[jbremer]

Furthermore, this doesn't work if people rename pythonw.exe. What do you think about doing this at all times - no matter python.exe or pythonw.exe?

[razuz]

sure why not ... the only downside would be that log will be written to file not console

I'll test this later today on vmcloak and cuckoo - just to be safe

[razuz]

this seems to work both ways ... haven't tested with cuckoo yet - will do that in morning

[razuz]

works in cuckoo aswell :)
I don't see any more connection drops on cuckoo which probably solves the file download anomaly we were looking at earlier ;)

so I guess it's good for merge