(ITS#4474) back-ldap not cleaning fds

[richton@nbcs.rutgers.edu]

Full_Name: Aaron Richton
Version: 2.3.20+ITS4429
OS: Solaris 9
URL: 
Submission from: (NULL) (128.6.31.135)


See also ITS#4420?

After running happily with back-ldap (with conn-ttl set to 30 just for stress of
the patch) for about a week, I got

 daemon: 4097 beyond descriptor table size 4096

lsof was hopeless. pfiles worked, and showed 4083 open connections outbound to
the host specified in the back-ldap uri argument.

This server doesn't have anywhere near that much load. It seems like conn-ttl
leaves the fd dangling? (Or maybe back-ldap does regardless, and conn-ttl brings
it to light.)