Log Message:
Enable _FFR_LDAP_NETWORK_TIMEOUT
This feature adds a -c switch to LDAPMAP definitions, which can be used to
specify a connection timeout (the equivalent of ldap.conf's bind_timeout)

Here is an usage example, in sendmail.cf:
O LDAPDefaultSpec=-w 3 -c 1 -l 3
If the server does not connect after 1 second (-c 1), we give up. If it does
not anwer after 3 seconds (-l 3), we give up with a temporary failure.

Using -c is the only way to avoid sendmail getting stuck against a half-dead
slapd, where the TCP port is in listening state but the server will not
serve anything.