CWRU/sh-redir-hack

Add to `subshell' production in parse.y and recompile -DREDIRECTION_HACK to
get `< xx (command)' sh compatibility.

	|	redirections '(' list ')'
			{
#if defined (REDIRECTION_HACK)
			  /* XXX - C News sh compatibility hack - XXX */
			  $3->redirects = $1;
			  $3->flags |= CMD_WANT_SUBSHELL;
			  $$ = $3;
#else
			  yyerror ();
			  YYABORT;
#endif
			}