[8.56] 3-in-1: Factory, Artillery Factory 'n strange healing

[psycho_dmr]

2- bunker only slow down the destroying of the base as the only slow down the capture of cps - was changed in 8.29.

Instead of blocking the capturing of a CP, a Barricade only slows it down by 50%

(imho 1 bunker slows it down by 25%, two then by 50%)