Docu update

doc/tex/environment.tex

@@ -10,5 +10,6 @@ The following table describes the environment variables that affect {\CDI}.
 \rowcolor{pcolor2}
 %\cellcolor{pcolor2}
 {\bf Variable name}           &  {\bfseries Default} & {\bfseries Description} \\ \hline
-CDI\_INVENTORY\_MODE   &   None   &  Set to time to skip double variable entries.
+CDI\_INVENTORY\_MODE   &   None   &  Set to time to skip double variable entries. \\
+CDI\_VERSION\_INFO          &         1   &  Set to 0 to disable netCDF global attribute CDI.
 \end{tabular}