Add and enable package "pdsh"
Added parallel/pdsh version 2.29
Racy build.
Add and enable devel/libdshconfig package
Added devel/libdshconfig version 0.20.13

Add parallel/dsh package

  dsh is an implementation of a wrapper for executing multiple remote shell
  (rsh/remsh/ssh) commands.  rsh/remsh/ssh are wrappers for executing shell
  (ksh/bash/zsh/tcsh/sh ..  etc...  ) on remote hosts.
+ dsh