…nks:

Basically:
ctags … -f .TAGS
ln -f .TAGS TAGS
rm -f .TAGS

for lowest possible inconsistency time when regenerating index.

Also, pass -G option to ctags, so that shell files without .zsh
extension get recognized by file constents (hashbangs and vim/emacs
modelines). It appears that it's the `--alias-zsh=+sh` and Emacs
`mode: sh` matching makes the non .zsh extension files properly
recognized and parsed.