Vim: augment shortmess to the max
Vim: augment shortmess to the max

I've turned off pretty much everything I can at this point and I am
still seeing the unwanted "ENTER to continue" messages on my sandbox. I
am going to have to troubleshoot that with `v:scrollstart`. I'm
suspicious of SELinux messages or something else that started when I
re-imaged.

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