CASE-SENSITIVE-VOC
* CASE-SENSITIVE-VOC ( -- )

accesses CONTEXT which is generally the last named VOCABULARY .
sets a flag in the vocabulary-definition so that words are matched
case-sensitive.
 example: 
    VOCABULARY MY-VOC  MY-VOC CASE-SENSITIVE-VOC
OBSOLETE! use DEFS-ARE-CASE-SENSITIVE

EXTENSIONS useful ordinary primitive