[Issue 15128] New: "IP_ADD_MEMBERSHIP" error in winsock2.d

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=15128

          Issue ID: 15128
           Summary: "IP_ADD_MEMBERSHIP" error in winsock2.d
           Product: D
           Version: D2
          Hardware: x86
                OS: Windows
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: phobos
          Assignee: nobody at puremagic.com
          Reporter: mzfhhhh at foxmail.com

//winsock.h ver1.0
#define IP_ADD_MEMBERSHIP   5

//WS2tcpip.h ver2.0
#define IP_ADD_MEMBERSHIP   12

//winsock2.d 
IP_ADD_MEMBERSHIP =  0x5, //this should be 12

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