+>>>
+>>> I implemented it (see branch ``paternal/libdirs``). I used [[smcv]]'s idea, but
+>>> avoiding side effects. I edited documentation as well. As usual, as neither
+>>> English nor Perl are my first languages (damn! I would be so much more
+>>> efficient in Python) feel free to improve my [[!taglink patch]].
+>>> [[!template id=gitbranch branch=spalax/paternal/libdirs browse="https://github.com/paternal/ikiwiki/tree/paternal/libdirs" author="[[Louis|spalax]]"]]
+
+>>>> While reviewing and applying your patch I decided the new
+>>>> "sometimes a list, sometimes not" behaviour of `libdir` was
+>>>> too confusing in documentation, so I made it work like underlaydir(s)
+>>>> instead: ikiwiki will now search each item of `$config{libdirs}`, then
+>>>> `$config{libdir}`. [[done]] --[[smcv]]
+
+>>>>> Good. I cannot see any justification apart from historical reasons, but I
+>>>>> agree with your choice.
+>>>>> -- [[Louis|spalax]]