This commit fixes the error

  _coffee:49: bad math expression: operand expected at `< 2 '

when the coffee command is missing or the `coffee --version` command fails.

It also uses is-at-least to check for the cut-off version for suggesting
`--lint` and `--require` arguments, instead of using `cut` multiple times.

Fixes #10759

* use https everywhere

* use https links on the files that are left

Also, removed some broken links and updated redirections.