Log message of: Less king danger...

The commit:

Less king danger if we have a knight near by to defend it

went in withouth proper commit message, here below we add it:

STC: LLR: 2.95 (-2.94,2.94) [0.50,4.50]
Total: 113106 W: 25087 L: 24367 D: 63652
http://tests.stockfishchess.org/tests/view/5c5517540ebc592fc7bb0eb4

LTC: LLR: 2.95 (-2.94,2.94) [0.00,3.50]
Total: 96669 W: 16318 L: 15872 D: 64479
http://tests.stockfishchess.org/tests/view/5c55352b0ebc592fc7bb11c8

bench: 3653942