code: private static String convertV0Cookie(HttpCookie cookie) {
          StringBuilder buffer = new StringBuilder(40);
  
          // Append name=value
          buffer.append(cookie.getName());
          String value = cookie.getValue();
          if (null != value && 0 != value.length()) {
              buffer.append('=');
              buffer.append(value);
          } else {
              // PK48196 - send an empty value string
              buffer.append("=\"\"");
          }
  
          // check for optional path
          value = cookie.getPath();
          if (null != value && 0 != value.length()) {
              buffer.append("; $Path=");
              buffer.append(value);
          }
          if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled()) {
              Tr.debug(tc, "Created v0 Cookie: [" + buffer.toString() + "]");
          }
          return buffer.toString();
      }
docs: Convert the V0 Cookie into a Cookie header string.
  
  @param cookie
  @return the value of the header.