Fix opt_zero-triggered in-place huge reallocation zeroing.
Fix opt_zero-triggered in-place huge reallocation zeroing.

Fix huge_ralloc_no_move_expand() to update the extent's zeroed attribute
based on the intersection of the previous value and that of the newly
merged trailing extent.

wqfish/jemalloc,8l/jemalloc,wqfish/jemalloc,wqfish/jemalloc,glandium/jemalloc,8l/jemalloc,wqfish/jemalloc,glandium/jemalloc,wqfish/jemalloc,glandium/jemalloc,8l/jemalloc,8l/jemalloc,glandium/jemalloc