patch 8.0.0466: still macros that should be all-caps

Problem:    There are still a few macros that should be all-caps.
Solution:   Make a few more macros all-caps.
diff --git a/src/syntax.c b/src/syntax.c
index d4aff52..027f2a6 100644
--- a/src/syntax.c
+++ b/src/syntax.c
@@ -4070,7 +4070,7 @@
 		    {0, NULL}
 		};
 
-    attr = hl_attr(HLF_D);		/* highlight like directories */
+    attr = HL_ATTR(HLF_D);		/* highlight like directories */
 
     /* list the keywords for "id" */
     if (!syncing)
@@ -4181,11 +4181,11 @@
     if (SYN_CLSTR(curwin->w_s)[id].scl_list != NULL)
     {
 	put_id_list((char_u *)"cluster", SYN_CLSTR(curwin->w_s)[id].scl_list,
-		    hl_attr(HLF_D));
+		    HL_ATTR(HLF_D));
     }
     else
     {
-	msg_puts_attr((char_u *)"cluster", hl_attr(HLF_D));
+	msg_puts_attr((char_u *)"cluster", HL_ATTR(HLF_D));
 	msg_puts((char_u *)"=NONE");
     }
 }
@@ -8999,7 +8999,7 @@
     {
 	(void)syn_list_header(didh, 9999, id);
 	didh = TRUE;
-	msg_puts_attr((char_u *)"links to", hl_attr(HLF_D));
+	msg_puts_attr((char_u *)"links to", HL_ATTR(HLF_D));
 	msg_putchar(' ');
 	msg_outtrans(HL_TABLE()[HL_TABLE()[id - 1].sg_link - 1].sg_name);
     }
@@ -9056,8 +9056,8 @@
 	{
 	    if (*name != NUL)
 	    {
-		MSG_PUTS_ATTR(name, hl_attr(HLF_D));
-		MSG_PUTS_ATTR("=", hl_attr(HLF_D));
+		MSG_PUTS_ATTR(name, HL_ATTR(HLF_D));
+		MSG_PUTS_ATTR("=", HL_ATTR(HLF_D));
 	    }
 	    msg_outtrans(ts);
 	}
@@ -9457,7 +9457,7 @@
 	{
 	    /* This is an error, but since there previously was no check only
 	     * give a warning. */
-	    msg_source(hl_attr(HLF_W));
+	    msg_source(HL_ATTR(HLF_W));
 	    MSG(_("W18: Invalid character in group name"));
 	    break;
 	}
@@ -9932,7 +9932,7 @@
     int		i;
 
     for (i = 10; --i >= 0; )
-	highlight_list_two(i, hl_attr(HLF_D));
+	highlight_list_two(i, HL_ATTR(HLF_D));
     for (i = 40; --i >= 0; )
 	highlight_list_two(99, 0);
 }