Bug fix: src ACL broken with sslproxy_cert_error

Bug fix: src ACL broken with sslproxy_cert_error

The following Squid configuration uses src ACL with sslproxy_cert_error:
   acl me src 172.16.101.51
   sslproxy_cert_error allow me
Cache log shows that the source IP address is missing when the 'me' ACL
is checked for sslproxy_cert_error:
   | ACL::checklistMatches: checking 'me'
   | aclIpAddrNetworkCompare: compare: *[::]/[ff...ff] ([::])*  vs ...
   | aclIpMatchIp: '[::]' NOT found

The problem is that the HttpRequest::client_addr is not set, for  the fake
HTTPS request created to initiate the  bump-server-first procedure.