Updating xcache
nss_ldap: fixing crash with glibc >= 2.16

I update it to the latest version, 265. Then I use some patches:

The nss_ldap-265-glibc-2.16.patch is the one that fixes the crash.
The crashes.patch is another one that I took from RH that said to fixes somes
crashes, but it didn't fix the crash I was seeing. But I guess it fixes
something.