(ITS#5309) ldap_pvt_thread_pool_setkey_x() addition

[h.b.furuseth@usit.uio.no]

Full_Name: Hallvard B Furuseth
Version: HEAD
OS: 
URL: 
Submission from: (NULL) (129.240.6.233)
Submitted by: hallvard


HEAD has gotten a new function ldap_pvt_thread_pool_setkey_x() replacing
ldap_pvt_thread_pool_setkey() (now a macro), but the change is incomplete.
Fixing thr_stub & thr_debug, they still define ldap_pvt_thread_pool_setkey.

Related: overlays/memberof.c, pool_<getkey and setkey_x> should receive
a pointer to a void variable, not a (void **) cast of the address of a
non-void pointer variable.  Otherwise a void* pointer gets stored in a
non-void* pointer instead of being converted to void.

I'll combine another of memberof's getkey() followed by setkey() into
setkey_x() while I'm at it.

Also making passwd.c:slap_passwd_check() and backend.c:be_rootdn_bind()
reentrant: Use setkey_x()/setkey() to push/pop the key=slap_sasl_bind
value instead of setkey()/setkey() to set/reset it.