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/search.c b/src/search.c
index ae365ae..71235aa 100644
--- a/src/search.c
+++ b/src/search.c
@@ -5013,7 +5013,7 @@
 		    {
 			/* using "new_fname" is more reliable, e.g., when
 			 * 'includeexpr' is set. */
-			msg_outtrans_attr(new_fname, hl_attr(HLF_D));
+			msg_outtrans_attr(new_fname, HL_ATTR(HLF_D));
 		    }
 		    else
 		    {
@@ -5059,7 +5059,7 @@
 			}
 			save_char = p[i];
 			p[i] = NUL;
-			msg_outtrans_attr(p, hl_attr(HLF_D));
+			msg_outtrans_attr(p, HL_ATTR(HLF_D));
 			p[i] = save_char;
 		    }
 
@@ -5124,7 +5124,7 @@
 			vim_snprintf((char*)IObuff, IOSIZE,
 				_("Scanning included file: %s"),
 				(char *)new_fname);
-			msg_trunc_attr(IObuff, TRUE, hl_attr(HLF_R));
+			msg_trunc_attr(IObuff, TRUE, HL_ATTR(HLF_R));
 		    }
 		    else
 #endif
@@ -5572,7 +5572,7 @@
 	    msg_puts(IObuff);
 	    sprintf((char *)IObuff, "%4ld", *lnum);	/* show line nr */
 						/* Highlight line numbers */
-	    msg_puts_attr(IObuff, hl_attr(HLF_N));
+	    msg_puts_attr(IObuff, HL_ATTR(HLF_N));
 	    MSG_PUTS(" ");
 	}
 	msg_prt_line(line, FALSE);