Add support for PostgreSQL 17 and EDB Postgres Advanced Server 17.

Code changes involve adjusting calls to some server-side functions
due to their signature changes.

FDW-682, Suraj Kharage, reviewed by Jeevan Chalke.

Makefile

@@ -42,6 +42,6 @@ ifndef MAJORVERSION
     MAJORVERSION := $(basename $(VERSION))
 endif
 
-ifeq (,$(findstring $(MAJORVERSION), 12 13 14 15 16))
-    $(error PostgreSQL 12, 13, 14, 15, or 16 is required to compile this extension)
+ifeq (,$(findstring $(MAJORVERSION), 12 13 14 15 16 17))
+    $(error PostgreSQL 12, 13, 14, 15, 16, or 17 is required to compile this extension)
 endif

README.md

@@ -5,7 +5,7 @@ This PostgreSQL extension implements a Foreign Data Wrapper (FDW) for
 [MongoDB][1].
 
 Please note that this version of mongo_fdw works with PostgreSQL and EDB
-Postgres Advanced Server 12, 13, 14, 15 and 16.
+Postgres Advanced Server 12, 13, 14, 15, 16 and 17.
 
 <img src="https://upload.wikimedia.org/wikipedia/commons/2/29/Postgresql_elephant.svg" align="center" height="100" alt="PostgreSQL"/>	+	<img src="https://www.tutorialsteacher.com/Content/images/home/mongodb.svg" align="center" height="100" alt="MongoDB"/>