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*
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*