How to stop Qemu from resetting terminal?

[Dave Blanchard]

One particularly annoying trait of Qemu is how it nukes my terminal settings. 
This is especially infuriating when booting Linux where the VM console is 
redirected to the serial port, which is then displayed on the host console. 
Among other things line wrapping is disabled, so compiler output for example is 
truncated at the end of the line! Then after the VM exits the console is kept 
in this screwed up state, so I have to reset it. 

How can this mis-feature be disabled? Preferably by command line, or 
alternately, where in the code is this happening so I can patch it to disable? 
I've tried in vain to find where it's happening in the code, with no luck.