Bugfix: rockminer: Keep count of requested jobs properly
rockminer: Add a time limit before resending work even outside of midtask state
rockminer: When we detect a task failure, check if we ought to grab a new work rather than resend
rockminer: Reset task timeout when queuing work
Merge branch 'rockminer' into bfgminer
configure: Succeed even if the libblkmaker submodule is missing (only --with-system-libblkmaker)
Merge commit '2104982' into bfgminer