0.4.3: bash completion symlinks to a noneexisting command are unfortunate

[hhoffstaette]

Working on bringing 0.4.3 into Gentoo I had an encounter with our QA police:

...
 * QA Notice: Problems with installed bash completions were found:
 * 
 * 	patchutils: incorrect name, no completions for 'patchutils' command defined.
 * 
 * For more details on installing bash-completions, please see:
 * https://wiki.gentoo.org/wiki/Bash/Installing_completion_files
...

It was explained to me that this is potentially "not great" and could crash.
A better way is to pick an existing command's completion as master completion file and symlink all others to that instead.