zsh: make history function unlimited
zsh: make history function unlimited

The default of 10 was too low, so I made this function with a limit of
1,000; but that's too low too. Let's just drop the limit.

wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent