Bug#479352: Please change startx to use /bin/sh instead of bash

[Ivan Baldo <ibaldo@adinet.com.uy>]

   Hello.
   I didn't see any problems using DASH with that script and it 
consumes less resources.
   I am testing some kind of dumb terminal (hybrid) with a Pentium 133 
Mhz with 32 Mib and avoiding BASH as much as possible helps a big deal.
   Thanks for doing the change, upstream should too.
   Bye.

--
Ivan Baldo - ibaldo@adinet.com.uy - http://ibaldo.codigolibre.net/
> From Montevideo, Uruguay, at the south of South America.
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