fix highlighting and change search mode a bit

doc/ncmpcpp_keys

@@ -81,6 +81,8 @@
 #
 #key_prev_found_position = ','
 #
+#key_toggle_find_mode = 'w'
+#
 #key_edit_tags = 'e'
 #
 #key_go_to_position = 'g'

doc/ncmpcpprc

@@ -70,12 +70,14 @@
 #
 #browser_playlist_prefix = "[red]playlist[/red] "
 #
-##### interface settings #####
+##### various settings #####
 #
 #autocenter_mode = "no"
 #
 #repeat_one_mode = "no"
 #
+#find_mode = "wrapped"
+#
 #header_visibility = "yes"
 #
 #statusbar_visibility = "yes"