patch 8.0.0589: :simalt still does not work

Problem:    :simalt still does not work.
Solution:   Use K_NOP instead of K_IGNORE. (Christian Brabandt)

patch 8.0.0588: job_stop() often assumes the channel will be closed

Problem:    job_stop() often assumes the channel will be closed, while the job
            may not actually be stopped. (Martin Gammelsæter)
Solution:   Only assume the job stops on "kill".  Don't send a signal if the
            job has already ended. (closes vim#1632)

patch 8.0.0587: configure check for return value of tgetent skipped

Problem:    Configure check for return value of tgetent is skipped.
Solution:   Always perform the check. (Marvin Schmidt, closes vim#1664)

patch 8.0.0586: no test for mapping timing out

Problem:    No test for mapping timing out.
Solution:   Add a test.

patch 8.0.0585: test_options fails when run in the GUI

Problem:    Test_options fails when run in the GUI.
Solution:   Also check the 'imactivatekey' value when the GUI is not running.
            Specify test values that work and that fail.

patch 8.0.0584: memory leak when executing quickfix tests

Problem:    Memory leak when executing quickfix tests.
Solution:   Free the list reference. (Yegappan Lakshmanan)

patch 8.0.0583: fold test hangs on MS-Windows

Problem:    Fold test hangs on MS-Windows.
Solution:   Avoid overflow in compare.

patch 8.0.0582: illegal memory access with z= command

Problem:    Illegal memory access with z= command. (Dominique Pelle)
Solution:   Avoid case folded text to be longer than the original text.  Use
            MB_PTR2LEN() instead of MB_BYTE2LEN().

patch 8.0.0581: moving folded text is sometimes not correct

Problem:    Moving folded text is sometimes not correct.
Solution:   Bail out when "move_end" is zero. (Matthew Malcomson)

patch 8.0.0580: cannot set the valid flag with setqflist()

Problem:    Cannot set the valid flag with setqflist().
Solution:   Add the "valid" argument. (Yegappan Lakshmanan, closes vim#1642)