bug#27167: eshell/sudo doesn't handle absolute command names correctly

[npostavs]

tags 27167 = fixed
close 27167 26.1
# I got 27167 and 27169 mixed up before
tags 27169 = unreproducible
quit

I pushed the fix to master [1: cf557fa9c5].  I had posted it to the
wrong bug [2].  This bug I could reproduce (with the caveat that 'eshell/sudo'
needs to be used instead of 'sudo', OP explained they made this alias in [3]).

[1: cf557fa9c5]: 2017-06-11 07:39:40 -0400
  Let eshell/sudo handle absolute command names (Bug#27167)
  
http://git.savannah.gnu.org/cgit/emacs.git/commit/?id=cf557fa9c53bb8795ddc744319e067515a9dba67

[2]: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=27169#18
[3]: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=27169#26