get rca-config from freesurfer dev (Deep-MI#159)

testing was successful, so these upstream fixes can be included into dev now.

Docker/install_fs_pruned.sh

@@ -361,7 +361,9 @@ ln -s $p3 $fsd/bin/fspython
 
 # modify rca_config to work with python3.8
 # (it misunderstands -hemi as -h for help and emi)
-sed -i 's/allow_abbrev=False/allow_abbrev=False,add_help=False/' $fsd/python/scripts/rca-config 
+# sed -i 's/allow_abbrev=False/allow_abbrev=False,add_help=False/' $fsd/python/scripts/rca-config 
+# this and problem with -s has been fixed in freesurfer dev, so we get it from there:
+wget https://raw.githubusercontent.com/freesurfer/freesurfer/dev/scripts/rca-config -O $fsd/python/scripts/rca-config
 
 #cleanup
 rm -rf $fss