rlo always unless no or blank

copyparty/__main__.py

@@ -1042,7 +1042,7 @@ def get_sects():
             .1   = when necessary, append a dot followed by a single digit
             .1!  = counter is always added, even when not necessary
             -3   = a hyphen followed by three-digit counter
-            (blank) = disable counter; overwrite existing logfile
+            no   = disable counter; overwrite existing logfile
             """
             ),
         ],

copyparty/svchub.py

@@ -233,9 +233,10 @@ class SvcHub(object):
 
         self.lo1 = self.lo2 = ""
         if args.lo:
-            if "%" in args.lo and "%R" not in args.lo:
+            if "%R" not in args.lo:
                 args.lo += "%R"
-            if not args.rlo:
+            if args.rlo in ("", "no"):
+                args.rlo = ""
                 args.lo = args.lo.replace("%R", "")
             try:
                 self.lo1, self.lo2 = args.lo.split("%R")