patch 8.0.0858: can exit while a terminal is still running a job

Problem:    Can exit while a terminal is still running a job.
Solution:   Consider a buffer with a running job like a changed file.

patch 8.0.0857: terminal test fails on MS-Windows

Problem:    Terminal test fails on MS-Windows.
Solution:   Sleep a fraction of a second.

patch 8.0.0856: MS-Windows: terminal job doesn't take options

Problem:    MS-Windows: terminal job doesn't take options.
Solution:   Call job_set_options(). (Yasuhiro Matsumoto)

patch 8.0.0855: MS-Windows: can't get tty name of terminal

Problem:    MS-Windows: can't get tty name of terminal.
Solution:   Use the winpty process number. (Yasuhiro Matsumoto, closes vim#1929)

patch 8.0.0854: no redraw after terminal was closed

Problem:    No redraw after terminal was closed.
Solution:   Set typebuf_was_filled. (Yasuhiro Matsumoto, closes vim#1925, closes
            vim#1924)  Add function to check for messages even when input is
            available.

patch 8.0.0853: crash when running terminal with unknown command

Problem:    Crash when running terminal with unknown command.
Solution:   Check "term" not to be NULL. (Yasuhiro Matsumoto, closes vim#1932)

patch 8.0.0852: MS-Windows: possible crash when giving a message on s…

…tartup

Problem:    MS-Windows: possible crash when giving a message on startup.
Solution:   Initialize length. (Yasuhiro Matsumoto, closes vim#1931)

patch 8.0.0851: 'smartindent' is used even when 'indentexpr' is set

Problem:    'smartindent' is used even when 'indentexpr' is set.
Solution:   Ignore 'smartindent' when 'indentexpr' is set. (Hirohito Higashi)

patch 8.0.0850: MS-Windows: error message while starting up may be br…

…oken

Problem:    MS-Windows: Depending on the console encoding, an error message
            that is given during startup may be broken.
Solution:   Convert the message to the console codepage. (Yasuhiro Matsumoto,
            closes vim#1927)

patch 8.0.0849: crash when job exit callback wipes the terminal

Problem:    Crash when job exit callback wipes the terminal.
Solution:   Check for b_term to be NULL.  (Yasuhiro Matsumoto, closes vim#1922)
            Implement options for term_start() to be able to test.
            Make term_wait() more reliable.