OpenSim.ini will now be kept on ‘our’ branch, so that we can restore the configuration if needed

.gitignore

@@ -116,7 +116,8 @@ OpenSim/Tests/test-results/
 test-results/
 doc/html
 doc/doxygen.error.log
-bin/OpenSim.ini
+# We might need to keep copies of the configuration in Git... (gwyneth 20210322)
+# bin/OpenSim.ini
 
 *.patch