Mapping user names from multiple attributes

[Jaap Winius]

Hi folks,

My site has user accounts defined in Kerberos and LDAP. User IDs,  
group IDs, given names and surnames are stored in LDAP using the  
person schema object E.g. for uid=jwinius, these are:

   cn: Jaap
   sn: Winius

However, I recently noticed that if I send email from a random host,  
the name included with the source email address is just "Jaap" when I  
would like it to be "Jaap Winius". I suspect libnss_ldap is responsible.

Is there an easy way to change how these names are mapped, so that  
user names would be composed of cn + space + sn?

Thanks,

Jaap