.zshrc robustness

.zshrc

 bindkey '^[[1;5D' backward-word                   # ctrl + <-
 bindkey '^[[5~' beginning-of-buffer-or-history    # page up
 bindkey '^[[6~' end-of-buffer-or-history          # page down
-bindkey '^[[H' beginning-of-line                  # home
-bindkey '^[[F' end-of-line                        # end
+bindkey "${terminfo[khome]}" beginning-of-line    # home
+bindkey "${terminfo[kend]}" end-of-line           # end
 bindkey '^[[Z' undo                               # shift + tab undo last action
 
 # enable completion features