work towards a clean compile on migrating set and get variables from Tag.

__system.cpp

@@ -20,7 +20,7 @@ namespace jet {
 	 dup2(fdo[1], 1);
 	 if(keywordDefined("input")) {
 	    resolveKeyword("input");
-	    coreutils::ZString input(keywords["input"]);
+	    coreutils::ZString input(keywords[resolveKeyword("input")]);
 	    pipe(fdi);
 	    if(fork() == 0) {
 	       close(fdi[0]);
@@ -31,13 +31,13 @@ namespace jet {
 	    close(fdi[1]);
 	    dup2(fdi[0], 0);
 	 }
-	 system(keywords["cmd"].c_str());
+	 system(keywords[resolveKeyword("cmd")].c_str());
 	 close(fdo[1]);
 	 exit(errno);
       }
       close(fdo[1]);
       if(keywordDefined("name")) 
-	global.variables[keywords["name"]].read(fdo[0]); 	 
+	global.variables[keywords[resolveKeyword("name")]].read(fdo[0]); 	 
       else 
 	out.read(fdo[0]);               
       waitpid(pid, &status, 0);