sh(1): interactive mode improvement
In the default configuration add 2 bindings which has been requested by
many during the HEADSUP discussion:
- csh like arrow history navigation
- ctrl-arrow to jump from word to words
Add an alias to make the history command exist as an alias to fc -l.
(cherry picked from commit ef0d94a3d34c880bd9f86cd842ee01b6075bc1d8)