attempt to regularize atoi mess.

TODO

@@ -295,9 +295,6 @@ Minor stuff:
   -> fprintf(stderr, "unalias: %s not found\n", *argptr);
 ---
   possible code duplication ingroup() and is_a_group_member()
----
-  unify itoa: netstat.c, hush.c, lash.c, msh.c
-  Put one single, robust version into e.g. safe_strtol.c
 ---
   Move __get_hz() to a better place and (re)use it in route.c, ash.c, msh.c
 ---