Add postmaster/postgres undocumented -b option for binary upgrades.

This option turns off autovacuum, prevents non-super-user connections,
and enables oid setting hooks in the backend.  The code continues to use
the old autoavacuum disable settings for servers with earlier catalog
versions.

This includes a catalog version bump to identify servers that support
the -b option.

src/include/miscadmin.h

@@ -124,6 +124,7 @@ do { \
 extern pid_t PostmasterPid;
 extern bool IsPostmasterEnvironment;
 extern PGDLLIMPORT bool IsUnderPostmaster;
+extern bool IsBinaryUpgrade;
 
 extern bool ExitOnAnyError;