input.conf: duplicate some keybind to keypad siblings

They still can be remapped individually by users, but let's duplicate
them by default.

More generic way of 8c6ad1d and
d06f3d3.

Fixes: mpv-player#15993

Author: kasper93

etc/input.conf

@@ -67,8 +67,6 @@
 #ZOOMIN    add video-zoom   0.1         # zoom in
 #Alt+-     add video-zoom  -0.1         # zoom out
 #ZOOMOUT   add video-zoom  -0.1         # zoom out
-#Alt+KP_ADD      add video-zoom  0.1    # zoom in
-#Alt+KP_SUBTRACT add video-zoom -0.1    # zoom out
 #Ctrl+WHEEL_UP   script-binding positioning/cursor-centric-zoom  0.1 # zoom in towards the cursor
 #Ctrl+WHEEL_DOWN script-binding positioning/cursor-centric-zoom -0.1 # zoom out towards the cursor
 #Alt+BS set video-zoom 0; no-osd set panscan 0; no-osd set video-pan-x 0; no-osd set video-pan-y 0; no-osd set video-align-x 0; no-osd set video-align-y 0 # reset zoom and pan settings
@@ -110,16 +108,12 @@
 #x add sub-delay +0.1                   # delay subtitles by 100 ms
 #ctrl++ add audio-delay  0.100          # change audio/video sync by delaying the audio
 #ctrl+- add audio-delay -0.100          # change audio/video sync by shifting the audio earlier
-#ctrl+KP_ADD      add audio-delay  0.100 # change audio/video sync by delaying the audio
-#ctrl+KP_SUBTRACT add audio-delay -0.100 # change audio/video sync by shifting the audio earlier
 #G add sub-scale +0.1                   # increase the subtitle font size
 #F add sub-scale -0.1                   # decrease the subtitle font size
 #9 add volume -2
 #/ add volume -2
-#KP_DIVIDE add volume -2
 #0 add volume 2
 #* add volume 2
-#KP_MULTIPLY add volume 2
 #m cycle mute                           # toggle mute
 #1 add contrast -1
 #2 add contrast 1
@@ -178,6 +172,7 @@
 #ctrl+c quit 4
 #Ctrl+v loadfile ${clipboard/text} append-play; show-text '+ ${clipboard/text}' # append the copied path
 #DEL script-binding osc/visibility      # cycle OSC visibility between never, auto (mouse-move) and always
+#KP_DEL script-binding osc/visibility   # cycle OSC visibility between never, auto (mouse-move) and always
 #ctrl+h cycle-values hwdec "no" "auto"  # toggle hardware decoding
 #F8 show-text ${playlist}               # show the playlist
 #F9 show-text ${track-list}             # show the list of video, audio and sub tracks
@@ -232,6 +227,36 @@
 #Ctrl+KP_UP    add video-align-y -0.01                          # align video up
 #Ctrl+KP_PGUP  add video-align-x  0.01; add video-align-y -0.01 # align video right and up
 
+#
+# Aliases for keypad keys
+#
+#KP_ADD keypress +
+#KP_BEGIN keypress BEGIN
+#KP_DEC keypress ,
+#KP_DEL keypress DEL
+#KP_DIVIDE keypress /
+#KP_DOWN keypress DOWN
+#KP_END keypress END
+#KP_ENTER keypress ENTER
+#KP_HOME keypress HOME
+#KP_INS keypress INS
+#KP_LEFT keypress LEFT
+#KP_MULTIPLY keypress *
+#KP_PGDWN keypress PGDWN
+#KP_PGUP keypress PGUP
+#KP_RIGHT keypress RIGHT
+#KP_SUBTRACT keypress -
+#KP_UP keypress UP
+
+#Alt+KP_ADD keypress Alt++
+#Alt+KP_SUBTRACT keypress Alt+-
+#Ctrl+KP_ADD keypress Ctrl++
+#Ctrl+KP_SUBTRACT keypress Ctrl+-
+#Shift+KP_END keypress Shift+END
+#Shift+KP_HOME keypress Shift+HOME
+#Shift+KP_PGDWN keypress Shift+PGDWN
+#Shift+KP_PGUP keypress Shift+PGUP
+
 #
 # Legacy bindings (may or may not be removed in the future)
 #