Limits the number of reopening attempts when establishing a single
TCP connection. All these attempts must still complete before the
applicable connection opening timeout expires.
By default and when connect_retries is set to zero, Squid does not
retry failed connection opening attempts.
The (not recommended) maximum is 10 tries. An attempt to configure a
higher value results in the value of 10 being used (with a warning).
Squid may open connections to retry various high-level forwarding
failures. For an outside observer, that activity may look like a
low-level connection reopening attempt, but those high-level retries
are governed by forward_max_tries instead.
See also: connect_timeout, forward_timeout, icap_connect_timeout,
and forward_max_tries.