This object provides the subject name from the X.509
certificate, or the alternate subject name if it is available.
The subject name is formatted as a character string matching the
output of a ssh-certview command-line application, except that
the application sending the notification may limit the string
length.
Example Subject Name: C=US, OU=DEV, CN=Test-01
Example Subject Alternative Name:
2001:0022:0022:0020:0000:0000:0000:0102