zsh: reset_swap, reset_cache: use sudo
zsh: reset_swap, reset_cache: use sudo

We used to invoke `su -m' to gain root access
(the `-m' to preserve the environment including shell aliases), before
using these aliases.

But this is simpler.

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