Add ctrl+arrow functions to keymap and kbdcontrol

* ctrl+up:    original function key is 50 -> put it to 70 and echo [1;5A
* ctrl+left:  original function key is 53 -> put it to 73 and echo [1;5D
* ctrl+right: original function key is 55 -> put it to 75 and echo [1;5C
* ctrl+down:  original function key is 58 -> put it to 78 and echo [A;5B
Add etc/env with bindings for sh
Add /etc/profile to read from /etc/env using ENV