Lilypond Feature [Reimplementation] Request: \override Slur #'attachment = #'(stem . stem)

[Kieren MacMillan]

Hi all,

I really do miss the ability [from the days of v2.4 and before] to say

    \override Slur #'attachment = #'(stem . stem)

Often, #'positions is a valid workaround (though a tedious and non-transposable 
one).
But often, it is not (e.g., when the first note is a flagged note, changing the 
Y-offset via #'positions does not change the X-offset of the starting point).

I searched the Google Code repository (for "slur"), and couldn't find any 
mention of this feature -- could we add it, with a bounty (from me, at least)?

Thanks,
Kieren.