[Typo3] value for the special.mode in HMENU

[Francesco di Francia]

For future reference, the alternativeSortingField works also in the 
Tmenu obecjt of an HMEN special-keywords object.

Here's the correct code:

### REVIEW LIST ###
lib.reviewlist = HMENU
lib.reviewlist.wrap = <div class="csc-menu csc-menu-4">|</div>
lib.reviewlist {
special = keywords
special {
       entrylevel = 0
   }
1 = TMENU
1.alternativeSortingField = subtitle asc
1.NO {
stdWrap.field= subtitle

}
}

Thanks to Ries Van Twisk who pointed me to a clarifyng post in the 
german lists, in chat at #typo3 irc room