Revert "Use a bitmask to represent role attributes"

This reverts commit 1826987a46.

The overall design was deemed unacceptable, in discussion following the
previous commit message; we might find some parts of it still
salvageable, but I don't want to be on the hook for fixing it, so let's
wait until we have a new patch.

src/backend/replication/logical/logicalfuncs.c

@@ -17,14 +17,18 @@
 
 #include <unistd.h>
 
-#include "access/xlog_internal.h"
-#include "catalog/pg_type.h"
 #include "fmgr.h"
 #include "funcapi.h"
-#include "mb/pg_wchar.h"
 #include "miscadmin.h"
+
+#include "access/xlog_internal.h"
+
+#include "catalog/pg_type.h"
+
 #include "nodes/makefuncs.h"
-#include "utils/acl.h"
+
+#include "mb/pg_wchar.h"
+
 #include "utils/array.h"
 #include "utils/builtins.h"
 #include "utils/inval.h"
@@ -32,9 +36,11 @@
 #include "utils/pg_lsn.h"
 #include "utils/resowner.h"
 #include "utils/lsyscache.h"
+
 #include "replication/decode.h"
 #include "replication/logical.h"
 #include "replication/logicalfuncs.h"
+
 #include "storage/fd.h"
 
 /* private date for writing out data */
@@ -199,7 +205,7 @@ XLogRead(char *buf, TimeLineID tli, XLogRecPtr startptr, Size count)
 static void
 check_permissions(void)
 {
-	if (!have_role_attribute(ROLE_ATTR_REPLICATION))
+	if (!superuser() && !has_rolreplication(GetUserId()))
 		ereport(ERROR,
 				(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
 				 (errmsg("must be superuser or replication role to use replication slots"))));

src/backend/replication/slotfuncs.c

@@ -20,14 +20,13 @@
 #include "replication/slot.h"
 #include "replication/logical.h"
 #include "replication/logicalfuncs.h"
-#include "utils/acl.h"
 #include "utils/builtins.h"
 #include "utils/pg_lsn.h"
 
 static void
 check_permissions(void)
 {
-	if (!have_role_attribute(ROLE_ATTR_REPLICATION))
+	if (!superuser() && !has_rolreplication(GetUserId()))
 		ereport(ERROR,
 				(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
 				 (errmsg("must be superuser or replication role to use replication slots"))));