Problem:    Cannot build on MS-Windows; Unused macro HAVE_HANDLE_DROP.
Solution:   Adjust #ifdef. Delete the macro.

Problem:    Saving and restoring window title does not always work.
Solution:   Use the stack push and pop commands. (Kouichi Iwamoto,
            closes #3059)

Problem:    Dropping files is ignored while Vim is busy.
Solution:   Postpone the effect of dropping files until it's safe.

Problem:    Long version string cannot be translated.
Solution:   Build the string in init_longVersion().

Problem:    Help text "usage:" is not capatalized.
Solution:   Make it "Usage:". (closes #3044)

Problem:    In terminal window, typing : at more prompt, inserts ':' instead
            of starting another Ex command.
Solution:   Add skip_term_loop and set it when putting ':' in the typeahead
            buffer.

Problem:    MS-Windows users expect -? to work like --help.
Solution:   Add -?. (Christian Brabandt, closes #2867)

Problem:    Older MSVC doesn't support declarations halfway a block.
Solution:   Move the declaration back to the start of the block.

Problem:    Declarations cannot be halfway a block.
Solution:   Move one declaration to check if this works for all compilers.

Problem:    Some macros are used without a semicolon, causing auto-indent to be
            wrong.
Solution:   Use the do-while(0) trick. (Ozaki Kiichi, closes #2729)