+*-l* 'LIMIT'::
+
+ If specified, only 'LIMIT' copies of the handler program are
+ allowed to run at one time. If further requests are received
+ while 'LIMIT' children are running, *httrcall* will block,
+ waiting for one to exit before processing further requests. If
+ no *-l* option is specified (or specified as zero), *httrcall*
+ imposes no limit on the number of children that may run.
+