xmr-stak "use slow memory" on Threadripper

[dertester]

Hey, nhm 2.0.2.6 beta sets "use_slow_memory": "always", That means a 20% drop on my 1950x.

On top of that the setting is overwritten in the config.txt and hidden in the general.json.

If its about people not configuring the large pages, there is a warn option that prints a message and defaults to slow memory.

IMO Thats stupid, if people dont want to search config files, they will switch the pool to smth. with better hashrates.