Hot liquids, such as lava and molten metals can be stored in barrels. I expected the barrel to either burn or not allow the fluid, but it did.

To Reproduce

1. put lava bucket (vanilla or blue steel) into the input slot of the barrel.
2. the lava will appear in the barrel, this happens with molten metals as well.

Meta Info

• TFC Version: 0.30.3.124
• Other mods were included, but I don't believe any of them caused this issue

Likely the best way to handle this would be a configurable barrel fluid whitelist (similar to what already exists for wooden buckets, jugs, etc.

This may need discussion. There's more than one way of addressing this:
1 - Whitelist = Hardest to exploit or have bugs, also hardest to maintain (we would need to add a new entry every time we add a new recipe that uses a different fluid)
2 - Blacklist = Somewhat easy to maintain, but also easily exploitable (drop a new mod here and you will probably have a somewhat not intended interaction)
3 - Bound to recipe = Very easy to maintain while also hardest to exploit, at the cost of being unable to store other fluids
4 - Temperature = Also very easy to maintain, although that can break some recipes if not configurable.

There's also a somewhat mix of the above, with configs and such, like for example: Using both 1 and 3 (best imo) or 1 and 2 (config toggle).