Add files for 3.1 version upgrade

set_user--3.0--3.1.sql

@@ -0,0 +1,6 @@
+/* set-user-3.0--3.1.sql */
+
+-- complain if script is sourced in psql, rather than via ALTER EXTENSION
+\echo Use "ALTER EXTENSION set_user UPDATE" to load this file. \quit
+
+-- just bumping our version to 3.1. no new SQL features here, so nothing to do.

set_user--3.1.sql

@@ -0,0 +1,55 @@
+/* set-user--3.0.sql */
+
+SET LOCAL search_path to @extschema@;
+
+-- complain if script is sourced in psql, rather than via CREATE EXTENSION
+\echo Use "CREATE EXTENSION set_user" to load this file. \quit
+
+CREATE FUNCTION @[email protected]_user(text)
+RETURNS text
+AS 'MODULE_PATHNAME', 'set_user'
+LANGUAGE C;
+
+CREATE FUNCTION @[email protected]_user(text, text)
+RETURNS text
+AS 'MODULE_PATHNAME', 'set_user'
+LANGUAGE C STRICT;
+
+REVOKE EXECUTE ON FUNCTION @[email protected]_user(text) FROM PUBLIC;
+REVOKE EXECUTE ON FUNCTION @[email protected]_user(text, text) FROM PUBLIC;
+
+CREATE FUNCTION @[email protected]_user()
+RETURNS text
+AS 'MODULE_PATHNAME', 'set_user'
+LANGUAGE C;
+
+CREATE FUNCTION @[email protected]_user(text)
+RETURNS text
+AS 'MODULE_PATHNAME', 'set_user'
+LANGUAGE C STRICT;
+
+GRANT EXECUTE ON FUNCTION @[email protected]_user() TO PUBLIC;
+GRANT EXECUTE ON FUNCTION @[email protected]_user(text) TO PUBLIC;
+
+/* New functions in 1.1 (now 1.4) begin here */
+
+CREATE FUNCTION @[email protected]_user_u(text)
+RETURNS text
+AS 'MODULE_PATHNAME', 'set_user'
+LANGUAGE C STRICT;
+
+REVOKE EXECUTE ON FUNCTION @[email protected]_user_u(text) FROM PUBLIC;
+
+/* No new sql functions for 1.5 */
+/* No new sql functions for 1.6 */
+/* No new sql functions for 2.0 */
+
+/* New functions in 3.0 begin here */
+
+CREATE FUNCTION @[email protected]_session_auth(text)
+RETURNS text
+AS 'MODULE_PATHNAME', 'set_session_auth'
+LANGUAGE C STRICT;
+REVOKE EXECUTE ON FUNCTION @[email protected]_session_auth(text) FROM PUBLIC;
+
+/* No new sql functions for 3.1 */