Feature request: 'line' articulation

[Michael Käppler]

Hi all,
after transcribing some baroque vocal and instrumental pieces I noticed 
that one articulation sign is used very often, but not provided by 
lilypond. It looks simply like a line, vertically placed above the note 
head. One could confuse it with the \staccatissimo symbol, which looks 
more than a small wedge. At this moment I achieve this with a simple 
markup: c^"|" but the line is too long. It would be far more elegant to 
have it in the font. (I know that adding new font items is a complicated 
task - but I think I could help with it)
The symbol's meaning can vary - mostly I found it above notes which 
shall have some "extra weight". The figure I attached is very common.
Unfortunately I don't have a scanner at this time, so I can't provide 
original images now. But if you're interested in implementing this, I 
could see where I can get images.

Cheers,
Michael