just a preformatted message (Tom, Sean Chittenden)
Allow control SSL negotiation with sslmode values "disable", "allow",
"Prefer", and "require" (Jon Jensen)
+Allow new error codes and levels of text (Tom)
+Allow access to the underlying table and column of a query result (Tom)
+Allow access to the current transaction status (Tom)
+Add ability to pass binary data directly to the backend (Tom)
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