zsh: use short name for vim
zsh: use short name for vim

We've gone through the trouble of making sure that PATH is properly
defined --- let's make use of it and just say "vim" instead of blindly
trusting "/usr/bin/vim" to be the right path.

listx/syscfg,listx/syscfg,listx/syscfg,listx/syscfg,listx/syscfg