Do not give the doubled pawn penalty when the frontmost pawn is
supported, for instance f2-g2-g3
STC:
LLR: 2.95 (-2.94,2.94) [0.00,5.00]
Total: 55927 W: 10418 L: 10052 D: 35457
http://tests.stockfishchess.org/tests/view/
58eb9fc20ebc59035df33858
LTC:
LLR: 2.96 (-2.94,2.94) [0.00,5.00]
Total: 32078 W: 4257 L: 4035 D: 23786
http://tests.stockfishchess.org/tests/view/
58ec48420ebc59035df3388b
Bench:
5995472
Closes #1062