CORTEX: Disabled all KERNEL/MEM/FS tuning. for now.

Allowd more aggresive OOM kill.
Added more min free RAM to protect kernel for death.

Now all the tuning will be as KERNEL code tuned.
cortexbrain modifycations
Maximazing FREE RAM and OOM kill. TNX dorimanx!
Merge remote branch 'halaszk/master'