Update Check_BP_Servers.sql

Improved Max Server Memory section to account for new, soon to be Microsoft's official documented recommendations;
Fixed PK violation in Index Health Analysis subsection;
Updated all docs and blog links;
Fixed Linked Server section (Thanks Petar Trbos);
Added Query Store configuration info for SQL 2016+ (Thanks Petar Trbos);
Added Automatic Tuning configuration info for SQL 2017+;
Added Automatic Tuning recommendations for SQL 2017+ (Thanks Petar Trbos and FifthMan);
Fixed Indexing per Table checks (Thanks FifthMan).

BPCheck/Check_BP_Servers.sql

@@ -9084,7 +9084,7 @@ BEGIN
 		SET @sqlcmdTR = 'USE ' + QUOTENAME(@dbName) + '; SELECT @HasRI_OUT = COUNT(*) FROM sys.dm_db_tuning_recommendations'
 		SET @paramsTR = N'@HasTR_OUT int OUTPUT'
 	
-		EXECUTE sp_executesql @sqlcmdTR, @paramsTR, HasTR_OUT = @HasTR OUTPUT
+		EXECUTE sp_executesql @sqlcmdTR, @paramsTR, @HasTR_OUT = @HasTR OUTPUT
 	END;
 
 	IF @HasTR > 0