Revert "futex: patches"

This reverts commit afcb0370555cab83a58b8ffbe0b6e5f1bb4eafc4.
Revert "futex: fixes"

This reverts commit d3ac4c836656e8a615f2d88b6d69006c0ba90597.
Revert "futex: increase hash table"

This reverts commit e18995e39fa5fad8b7e7fcd575505c3b09e0ce21.
Revert "futex cleanup"

This reverts commit a1a10c5bb3cde3633e46336fa0b8982c1ff899eb.
Revert "futex: move user address verification up to common code"

This reverts commit 35141ae35a2200acec07f9183712edbcfc40d6d3.