Bump-server-first fails with SQUID_X509_V_ERR_DOMAIN_MISMATCH error

Bump-server-first fails with SQUID_X509_V_ERR_DOMAIN_MISMATCH error

When the bump-server-first used we do not always know the hostname of the server
we are connecting to. Thus the the hostname validity check for the
SSL server certificate will fail with SQUID_X509_V_ERR_DOMAIN_MISMATCH error.

This patch does not check if server certificate is valid for the hostname on
bump-server-first case and move this check after the http request received
from the web client