(ITS#8454) audit-log overlay man pag needs some improvement

[elecharny@apache.org]

Full_Name: Emmanuel Lecharny
Version: 2.4.44
OS: 
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (78.235.65.101)


The current slapo-auditlog could be improve a bit by providing some more context
about the audit log file content. Typically, the first like contains important
informations like :
- the operation
- the timestamp
- the database suffix
- the modifiers' name
- and the connection ID

When this connection ID is -1, it would be interesting in the man page to inform
the users that this update is an internal update (ie, something caused by an
internal slapd update, not an user update).

A simple sentence could be : "A 'conn=-1' in the first line tells that this is
an internal operation, not an user initiated operation".