Problem:    Unloading shared libraries on exit has no purpose.
Solution:   Do not unload shared libraries on exit.

Problem:    Using old C style comments.
Solution:   Use // comments where appropriate.

Problem:    pyeval() and py3eval() leak memory.
Solution:   Do not increase the reference count twice. (Ozaki Kiichi,
            closes #4129)

Problem:    Using :python sets 'pyxversion' even when not executed.
Solution:   Check the "skip" flag. (Shane Harper, closes #3995)

Problem:    Macros for MS-Windows are inconsistent, using "32", "3264 and
            others.
Solution:   Use MSWIN for all MS-Windows builds.  Use FEAT_GUI_MSWIN for the
            GUI build. (Hirohito Higashi, closes #3932)

Problem:    Cannot build Python interface with Python 2.4. (Tom G. Christensen)
Solution:   Define PyBytes_FromStringAndSize. (Ken Takata, closes #3888)

Problem:    Giving error messages is not flexible.
Solution:   Add semsg().  Change argument from "char_u *" to "char *", also
            for msg() and get rid of most MSG macros. (Ozaki Kiichi, closes
            #3302)  Also make emsg() accept a "char *" argument.  Get rid of
            an enormous number of type casts.

Problem:    Cannot handle binary data.
Solution:   Add the Blob type. (Yasuhiro Matsumoto, closes #3638)

Problem:    Python interface is incompatible with lldb.
Solution:   For OutputType set the base to be PyFile_Type. (Boxu Zhang)
            Partly disabled to avoid a crash.

Problem:    Warnings for conversion of void to function pointer.
Solution:   Use a temp variable that is a function pointer.