allow -u to accept a comma separated list of users

slurm-eff-tool.py

@@ -903,7 +903,8 @@ def filter_records(records: list[JobRecord],
         records = [r for r in records if r.state in allowed_states]
 
     if filter_user:
-        records = [r for r in records if r.username == filter_user]
+        userlist = filter_user.split(',')
+        records = [r for r in records if r.username in userlist]
 
     return records
 
@@ -1238,7 +1239,7 @@ def parse_args(argv: list[str]) -> argparse.Namespace:
                    default="now - 24 hours")
     p.add_argument("-E", "--end", help="sacct end time, passed to sacct -E",
                    default="now")
-    p.add_argument("-u", "--user", help="restrict to a single user at sacct DB search")
+    p.add_argument("-u", "--user", help="comma separated list of users (affects sacct DB search or filters later from cache file)")
     p.add_argument("-U", "--aggr-user", action="store_true", help="aggregate jobs by user, CPUs, nodes, ReqMem, and timelimit")
     p.add_argument(
         "-R",