Copy .dbxinit to _dbxinit.

config.bat

@@ -270,6 +270,7 @@ rem   ----------------------------------------------------------------------
 :maindir
 Echo Configuring the main directory...
 If Exist .dir-locals.el update .dir-locals.el _dir-locals.el
+If Exist src\.dbxinit update src/.dbxinit src/_dbxinit
 If "%DJGPP_VER%" == "1" goto mainv1
 Echo Looking for the GDB init file...
 If Exist src\.gdbinit update src/.gdbinit src/_gdbinit