add USR1 handler for history emergency
add USR1 handler for history emergency

nestukh/dotfiles,benizi/dotfiles,nestukh/dotfiles,nestukh/dotfiles,benizi/dotfiles,nestukh/dotfiles,benizi/dotfiles,benizi/dotfiles,benizi/dotfiles,benizi/dotfiles,benizi/dotfiles,nestukh/dotfiles,benizi/dotfiles,nestukh/dotfiles,nestukh/dotfiles,nestukh/dotfiles