Fix an early return in ctld UCL parser

If the UCL ctld parser encountered a port that used the CTL
ioctl device, it fell into a special case that had an erroneous
early return.  This caused all configuration in the target
following the port attribute to be skipped.  Fix this by replacing
the return with a continue so that the rest of the config is
parsed correctly.

Sponsored by: Dell EMC Isilon
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D31703
Reviewed by: bapt

usr.sbin/ctld/uclparse.c

@@ -847,7 +847,7 @@ uclparse_target(const char *name, const ucl_object_t *top)
 					return (1);
 				}
 
-				return (0);
+				continue;
 			}
 
 			pp = pport_find(conf, value);