mksh import

[Adam Hamsik <haaaad%gmail.com@localhost>]

Hi folks,

I think that it would be good to have at least one modern shell in our base, 
because I use ksh and it's de facto standard I have decided to make a patch 
which adds mksh[1] to our base [2]. Code is BSD licensed, well written and 
maintained which can't be said about our own ksh(There are 15 PRs opened for 
it). 

I would like to discuss this option to see if something like this would be 
possible. I know that every developer has it's own preference for shell, but 
have at least one modern shell should be priority for all of us.

[1] http://www.mirbsd.org/mksh.htm
[2] www.netbsd.org/~haad/mksh-r39.bz2

Regards

Adam.