patch 8.1.2029: cannot control 'cursorline' highlighting well

Problem:    Cannot control 'cursorline' highlighting well.
Solution:   Add "screenline". (Christian Brabandt, closes #4933)
diff --git a/src/highlight.c b/src/highlight.c
index 8901994..725affc 100644
--- a/src/highlight.c
+++ b/src/highlight.c
@@ -161,8 +161,8 @@
 	 "Directory term=bold ctermfg=DarkBlue guifg=Blue"),
     CENT("LineNr term=underline ctermfg=Brown",
 	 "LineNr term=underline ctermfg=Brown guifg=Brown"),
-    CENT("CursorLineNr term=bold ctermfg=Brown",
-	 "CursorLineNr term=bold ctermfg=Brown gui=bold guifg=Brown"),
+    CENT("CursorLineNr term=bold cterm=underline ctermfg=Brown",
+	 "CursorLineNr term=bold cterm=underline ctermfg=Brown gui=bold guifg=Brown"),
     CENT("MoreMsg term=bold ctermfg=DarkGreen",
 	 "MoreMsg term=bold ctermfg=DarkGreen gui=bold guifg=SeaGreen"),
     CENT("Question term=standout ctermfg=DarkGreen",
@@ -252,8 +252,8 @@
 	 "Directory term=bold ctermfg=LightCyan guifg=Cyan"),
     CENT("LineNr term=underline ctermfg=Yellow",
 	 "LineNr term=underline ctermfg=Yellow guifg=Yellow"),
-    CENT("CursorLineNr term=bold ctermfg=Yellow",
-	 "CursorLineNr term=bold ctermfg=Yellow gui=bold guifg=Yellow"),
+    CENT("CursorLineNr term=bold cterm=underline ctermfg=Yellow",
+	 "CursorLineNr term=bold cterm=underline ctermfg=Yellow gui=bold guifg=Yellow"),
     CENT("MoreMsg term=bold ctermfg=LightGreen",
 	 "MoreMsg term=bold ctermfg=LightGreen gui=bold guifg=SeaGreen"),
     CENT("Question term=standout ctermfg=LightGreen",