add host time for games sent from server with game info

[GrotheFAF]

I think it would be usefull information to see how old a hosted game is.

[0x647262]

@Askaholic you can assign this one to me

[Askaholic]

Sure. It would also need to be added in the client too. Not sure how much people care about it since there hasn't been any discussion on the issue. Maybe @axel1200 or @micheljung have an opinion on this?

When you send the start time send it as an ISO formatted datetime just like the queue pop time in matchmaker_info.

[1-alex98]

Well can not hurt to put it in the server message right

[KaukaHan]

I can add this if needed. Might such information be usefull to determine average lobbysim time ?

[Askaholic]

Not sure why I added 'requires client changes' label, since the it doesn't have to be implemented in the client to add it here. I agree with @1-alex98, I don't see a reason to not add it since the client can just ignore it if it wants to.