bugfix #3347: 'Certificate Authority SAN names not working in 2.

1'

subjectAltName can be set only via configuration file - created three extra sections in openssl.cnf to use in case of existing subjectAltName.

Unfortunately it is not possible to assign empty value to subjectAltName in openssl.cnf

on branches hotfix/3347-Certificate_Authority_SAN_names_not_working, master
branches hotfix/3347-Certificate_Authority_SAN_names_not_working