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Rework the "unsupported" penalty into a "supported" bonus
A pawn (according to all the searched positions of a bench run) is not supported 85% of the time, (in current master it is either isolated, backward or "unsupported"). So it made sense to try moving the S(17, 8) "unsupported" penalty value into the base pawn value hoping for a more representative pawn value, and accordingly a) adjust backward and isolated so that they stay more or less the same as master b) increase the mg connected bonus in the supported case by S(17, 0) and let the Connected formula find a suitable eg value according to rank. Tested as a simplification SPRT(-3, 1) Passed STC http://tests.stockfishchess.org/tests/view/5970dbd30ebc5916ff649dd6 LLR: 2.95 (-2.94,2.94) [-3.00,1.00] Total: 19613 W: 3663 L: 3540 D: 12410 Passed LTC http://tests.stockfishchess.org/tests/view/597137780ebc5916ff649de3 LLR: 2.95 (-2.94,2.94) [-3.00,1.00] Total: 24721 W: 3306 L: 3191 D: 18224 Bench: 5581946 Closes #1179
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