patch 8.1.0811: too many #ifdefs

Problem:    Too many #ifdefs.
Solution:   Graduate FEAT_MBYTE, the final chapter.
diff --git a/src/appveyor.bat b/src/appveyor.bat
index 761f9b8..f64a05e 100644
--- a/src/appveyor.bat
+++ b/src/appveyor.bat
@@ -7,7 +7,7 @@
 cd src
 echo "Building MinGW 32bit console version"
 set PATH=c:\msys64\mingw32\bin;%PATH%
-mingw32-make.exe -f Make_ming.mak GUI=no OPTIMIZE=speed IME=yes MBYTE=yes ICONV=yes DEBUG=no FEATURES=%FEATURE% || exit 1
+mingw32-make.exe -f Make_ming.mak GUI=no OPTIMIZE=speed IME=yes ICONV=yes DEBUG=no FEATURES=%FEATURE% || exit 1
 :: Save vim.exe before Make clean, moved back below.
 copy vim.exe testdir
 mingw32-make.exe -f Make_ming.mak clean
@@ -16,24 +16,24 @@
 :: with specified features without python.
 echo "Building MinGW 32bit GUI version"
 if "%FEATURE%" == "HUGE" (
-    mingw32-make.exe -f Make_ming.mak OPTIMIZE=speed CHANNEL=yes GUI=yes IME=yes MBYTE=yes ICONV=yes DEBUG=no PYTHON_VER=27 DYNAMIC_PYTHON=yes PYTHON=C:\Python27 PYTHON3_VER=35 DYNAMIC_PYTHON3=yes PYTHON3=C:\Python35 FEATURES=%FEATURE% || exit 1
+    mingw32-make.exe -f Make_ming.mak OPTIMIZE=speed CHANNEL=yes GUI=yes IME=yes ICONV=yes DEBUG=no PYTHON_VER=27 DYNAMIC_PYTHON=yes PYTHON=C:\Python27 PYTHON3_VER=35 DYNAMIC_PYTHON3=yes PYTHON3=C:\Python35 FEATURES=%FEATURE% || exit 1
 ) ELSE (
-    mingw32-make.exe -f Make_ming.mak OPTIMIZE=speed GUI=yes IME=yes MBYTE=yes ICONV=yes DEBUG=no FEATURES=%FEATURE% || exit 1
+    mingw32-make.exe -f Make_ming.mak OPTIMIZE=speed GUI=yes IME=yes ICONV=yes DEBUG=no FEATURES=%FEATURE% || exit 1
 )
 .\gvim -u NONE -c "redir @a | ver |0put a | wq" ver_ming.txt
 
 echo "Building MSVC 64bit console Version"
 sed -e "s/\$(LINKARGS2)/\$(LINKARGS2) | sed -e 's#.*\\\\r.*##'/" Make_mvc.mak > Make_mvc2.mak
-nmake -f Make_mvc2.mak CPU=AMD64 OLE=no GUI=no IME=yes MBYTE=yes ICONV=yes DEBUG=no FEATURES=%FEATURE% || exit 1
+nmake -f Make_mvc2.mak CPU=AMD64 OLE=no GUI=no IME=yes ICONV=yes DEBUG=no FEATURES=%FEATURE% || exit 1
 nmake -f Make_mvc2.mak clean
 
 :: build MSVC huge version with python and channel support
 :: GUI needs to be last, so that testing works
 echo "Building MSVC 64bit GUI Version"
 if "%FEATURE%" == "HUGE" (
-    nmake -f Make_mvc2.mak DIRECTX=yes CPU=AMD64 CHANNEL=yes OLE=no GUI=yes IME=yes MBYTE=yes ICONV=yes DEBUG=no PYTHON_VER=27 DYNAMIC_PYTHON=yes PYTHON=C:\Python27-x64 PYTHON3_VER=35 DYNAMIC_PYTHON3=yes PYTHON3=C:\Python35-x64 FEATURES=%FEATURE% || exit 1
+    nmake -f Make_mvc2.mak DIRECTX=yes CPU=AMD64 CHANNEL=yes OLE=no GUI=yes IME=yes ICONV=yes DEBUG=no PYTHON_VER=27 DYNAMIC_PYTHON=yes PYTHON=C:\Python27-x64 PYTHON3_VER=35 DYNAMIC_PYTHON3=yes PYTHON3=C:\Python35-x64 FEATURES=%FEATURE% || exit 1
 ) ELSE (
-    nmake -f Make_mvc2.mak CPU=AMD64 OLE=no GUI=yes IME=yes MBYTE=yes ICONV=yes DEBUG=no FEATURES=%FEATURE% || exit 1
+    nmake -f Make_mvc2.mak CPU=AMD64 OLE=no GUI=yes IME=yes ICONV=yes DEBUG=no FEATURES=%FEATURE% || exit 1
 )
 .\gvim -u NONE -c "redir @a | ver |0put a | wq" ver_msvc.txt