Rename score to value in ExtMove

We use 'score' for the value mid-endgame pair.

No functional change.
Refresh TT entries generation automatically on probe

And other assorted simplifications, tested with SPRT[-3, 1]

Passed both short TC
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 18814 W: 3600 L: 3475 D: 11739

And long TC
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 20731 W: 3217 L: 3096 D: 14418

No functional change.
Retire last usage of operator|(File f, Rank r)

This for some reason was missed.

No functional change.
Fix an incorrect 'friend' declaration

Spotted by Lee David.

No functional change.
Merge remote-tracking branch 'upstream/master'