- 
    
Sub-task
 - 
    Resolution: Won't Do
 - 
    
  Not Evaluated                     
     - 
    None
 - 
    None
 
configure support multiple styles for the same argument, tool should support all of them
e.g.:
-gui -no-gui --gui --no-gui -enable-gui -disable-gui --enable-gui --disable-gui --gui=yes --gui=no