Request: git stash create --include-untracked

Hello,

`git stash create` does not accepts the same options that `git stash save` accepts.

It would be handy to have `git stash create` accept `-u`/`--include-untracked` and `-a`/`--all`. This would allow a very simple "freeze-the-world-I-have-to-leave emergency backup" command such as

     git push -f origin $(git stash create 
-u):refs/heads/emergency/$USER-$(date +%s)

(Derived from <https://lwn.net/Articles/664137/> by user nybble41; useful for <http://stackoverflow.com/q/10226586/449288>.)

Regards,