keysrc and prefix keys

I  was thinking  of implementing  more of  Firefox's key  shortcuts in
Dillo, namely Alt-<n> -> "Go to nth tab"  for <n> = 1, 2, 3, ... 8 and
Alt-9 -> "Go to last tab".  (That last one would be really useful when
I have more tabs open than will fit in the tab bar.)

But then I thought "how do we configure this in keysrc?".  The obvious
solution is to  add separate entries for each of  the 9 commands.  But
this is  clearly silly because  no-one wants to  use, say, Alt  as the
prefix for going to the 4th tab but Ctrl-Shift as the prefix for going
to the 5th tab.  Why should users have to add 9 entries to keysrc just
because they prefer Ctrl-Shift to Alt?

So I  think we  really want  a single keyssrc  entry that  defines the
modifier keys  that bind the 1,  2, 3, ... 9  keys to the  "Go to tab"
commands.  But  this would significantly complicate  the current code.
Is it worth it?

Regards,

Jeremy Henty