PAM unable to resolve symbol: pam_sm_acct_mgmt

This message means that a module that is being used for account management does
not provide account management. The problem is that there is no way to easily
tell which module is the culprit. A more useful message would be "PAM unable to
load as account module: pam_module". As for the security flag if the
administrator is counting on a module for account restriction and it doesn't he
needs to know this.