Add the 'concealcursor' option to decide when the cursor line is to be
concealed or not.
Rename 'conc' to 'cole' as the short name for 'conceallevel'.
diff --git a/src/main.c b/src/main.c
index 029b64c..d94b32a 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1098,7 +1098,7 @@
 			||
 # endif
 # ifdef FEAT_CONCEAL
-			curwin->w_p_conc > 0
+			curwin->w_p_cole > 0
 # endif
 			)
 		 && !equalpos(last_cursormoved, curwin->w_cursor))
@@ -1109,7 +1109,7 @@
 							       FALSE, curbuf);
 # endif
 # ifdef FEAT_CONCEAL
-		if (curwin->w_p_conc > 0)
+		if (curwin->w_p_cole > 0)
 		{
 		    conceal_old_cursor_line = last_cursormoved.lnum;
 		    conceal_new_cursor_line = curwin->w_cursor.lnum;
@@ -1197,9 +1197,12 @@
 
 # if defined(FEAT_CONCEAL)
 	    if (conceal_update_lines
-		    && conceal_old_cursor_line != conceal_new_cursor_line)
+		    && (conceal_old_cursor_line != conceal_new_cursor_line
+			|| conceal_cursor_line(curwin)
+			|| need_cursor_line_redraw))
 	    {
-		update_single_line(curwin, conceal_old_cursor_line);
+		if (conceal_old_cursor_line != conceal_new_cursor_line)
+		    update_single_line(curwin, conceal_old_cursor_line);
 		update_single_line(curwin, conceal_new_cursor_line);
 		curwin->w_valid &= ~VALID_CROW;
 	    }