(ITS#4790) re23 hangs during shutdown after test033

[ando@sys-net.it]

Full_Name: Pierangelo Masarati
Version: re23 (2.3.31)
OS: Linux
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (87.28.220.33)


Apparently, one thread is unable to terminate correctly, so the test succeeds,
but then slapd hangs forever in ldap_pvt_thread_pool_destroy().  I couldn't
investigate this in depth right now, but I could easily reproduce it on two
different systems (different kernels and so), so I'm positive I can easily
reproduce it.

p.