[Bug 21046] New: cmd does not handle all operators in 'if' command

http://bugs.winehq.org/show_bug.cgi?id=21046

Summary: cmd does not handle all operators in 'if' command
           Product: Wine
           Version: 1.1.34
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: programs
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

bug 15359 mentions that firefox's build scripts use commands like
  IF %ERRORLEVEL% EQU 0
wine's cmd only supports == and != operators;
windows' cmd also supports equ, neq, lss, leq, gtr, geq.