mxqd: remove RLIMIT_AS and RLIMIT_RSS

Remove RLIMIT_AS, because we to limit physical memory usage, not virtual
memory for file-backed mappings.

Remove RLIMIT_RSS, because this limit has no effect since Linux 2.4.30.

mxqd.c

@@ -930,21 +930,11 @@ static int init_child_process(struct mxq_group_list *glist, struct mxq_job *job)
     rlim.rlim_cur = group->job_memory*1024*1024;
     rlim.rlim_max = group->job_memory*1024*1024;
 
-    res = setrlimit(RLIMIT_AS, &rlim);
-    if (res == -1)
-        mx_log_err("job=%s(%d):%lu:%lu setrlimit(RLIMIT_AS, ...) failed: %m",
-                    group->user_name, group->user_uid, group->group_id, job->job_id);
-
     res = setrlimit(RLIMIT_DATA, &rlim);
     if (res == -1)
         mx_log_err("job=%s(%d):%lu:%lu setrlimit(RLIMIT_DATA, ...) failed: %m",
                     group->user_name, group->user_uid, group->group_id, job->job_id);
 
-    res = setrlimit(RLIMIT_RSS, &rlim);
-    if (res == -1)
-        mx_log_err("job=%s(%d):%lu:%lu setrlimit(RLIMIT_RSS, ...) failed: %m",
-                    group->user_name, group->user_uid, group->group_id, job->job_id);
-
     /* disable core files */
     rlim.rlim_cur = 0;
     rlim.rlim_cur = 0;