patch 7.4.1421

Problem:    May free a channel when a callback may need to be invoked.
Solution:   Keep the channel when refcount is zero.

patch 7.4.1420

Problem:    Missing makefile.
Solution:   Type the path correctly.

patch 7.4.1419

Problem:    Tests slowed down because of the "not a terminal" warning.
Solution:   Add the --not-a-term command line argument.

patch 7.4.1418

Problem:    job_stop() on MS-Windows does not really stop the job.
Solution:   Make the default to stop the job forcefully. (Ken Takata)
            Make MS-Windows and Unix more similar.

patch 7.4.1417

Problem:    Missing appveyor.bat from the distribution.
Solution:   Add it to the list of files.

patch 7.4.1416

Problem:    Using "u_char" intead of "char_u", which doesn't work everywhere.
            (Jörg Plate)
Solution:   Use "char_u" always.

patch 7.4.1415

Problem:    Dropped the skip-tags setting.
Solution:   Put it back.

patch 7.4.1414

Problem:    Appveyor only builds one feature set.
Solution:   Build a combination of features and GUI/console. (Christian
            Brabandt)

patch 7.4.1413

Problem:    When calling ch_close() the close callback is invoked, even though
            the docs say it isn't. (Christian J. Robinson)
Solution:   Don't call the close callback.

patch 7.4.1412

Problem:    Compiler warning for indent. (Dominique Pelle)
Solution:   Fix the indent.