I have been recently working on a map and I noticed that the "Resource packs in world files" doesn't work on servers but they do work in single player worlds. if this is a bug it is really annoying for the multiplayer maps that still have to put a download link for the resource pack.
MC-69730
the rescource packs in maps don't work on servers
Resolved
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0
(Unassigned)
Unconfirmed
Minecraft 14w33c, Minecraft 14w34a, Minecraft 14w34b, Minecraft 14w34d, Minecraft 1.8-pre1, Minecraft 1.8-pre2
Retrieved
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On servers, you are supposed to use the server ressourcepack system.