RF: Don't export empty / unused variables by default

etc/fslconf/fsl.sh

@@ -43,8 +43,8 @@ fi
 #   NIFTI_PAIR_GZ
 #   NIFTI2_PAIR_GZ
 #
-# This would typically be overwritten in ${HOME}/.fslconf/fsl.sh if the user wished
-# to write files with a different format
+# This would typically be overwritten in ${HOME}/.fslconf/fsl.sh if the user 
+# wished to write files with a different format
 export FSLOUTPUTTYPE=NIFTI_GZ
 
 # Comment out the definition of FSLMULTIFILEQUIT to enable
@@ -62,9 +62,10 @@ export FSLWISH=$FSLDIR/bin/fslwish
 # The following variables are used for running code in parallel across
 #  several machines ( i.e. for FDT )
 
-export FSLLOCKDIR=
-export FSLMACHINELIST=
-export FSLREMOTECALL=
+# export FSLLOCKDIR=
+# export FSLMACHINELIST=
+# export FSLREMOTECALL=
+# export FSLPARALLEL=
 
 # The following variables are used to configure CUDA capable queues - if you
 # are using Grid Engine then this queue will be used to enqueue tasks that