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.

patch 8.0.0848: using multiple ch_log functions is clumsy

Problem:    Using multiple ch_log functions is clumsy.
Solution:   Use variable arguments. (Ozaki Kiichi, closes vim#1919)

patch 8.0.0847: :argadd without argument can't handle space in file name

Problem:    :argadd without argument can't handle space in file name. (Harm te
            Hennepe)
Solution:   Escape the space. (Yasuhiro Matsumoto, closes vim#1917)

patch 8.0.0846: cannot get the name of the pty of a job

Problem:    Cannot get the name of the pty of a job.
Solution:   Add the "tty" entry to the job info. (Ozaki Kiichi, closes vim#1920)
            Add the term_gettty() function.

patch 8.0.0845: MS-Windows: missing semicolon in terminal code

Problem:    MS-Windows: missing semicolon in terminal code.
Solution:   Add it. (Naruhiko Nishino, closes vim#1923)

patch 8.0.0844: wrong function prototype because of missing static

Problem:    Wrong function prototype because of missing static.
Solution:   Add "static".

patch 8.0.0843: MS-Windows: compiler warning for signed/unsigned

Problem:    MS-Windows: compiler warning for signed/unsigned.
Solution:   Add type cast. (Yasuhiro Matsumoto, closes vim#1912)

patch 8.0.0842: using slave pty after closing it

Problem:    Using slave pty after closing it.
Solution:   Do the ioctl() before dup'ing it.

patch 8.0.0841: term_getline() may cause a crash

Problem:    term_getline() may cause a crash.
Solution:   Check that the row is valid. (Hirohito Higashi)