improve history handling (merge history incrementally BUT leave every open zsh with its own history
improve history handling (merge history incrementally BUT leave every open zsh with its own history

Signed-off-by: Dominik Richter <b7323add517e187efe0283b76511b7ed762bfe13@gmail.com>

arlimus/zero.zsh,atomic111/zero.zsh,arlimus/zero.zsh,atomic111/zero.zsh