This update is required by the samba update to 4.1.11.

- Require pkg-config from the devel sub packages and do not BuildRequire it
from libldb.

- Update to 1.1.17.
+ pyldb: add some more helper functions for LdbDn
+ pyldb: fix doc string for set_extended_component()
+ pyldb: add some const to PyObject_FromLdbValue()
+ Add a env variable to disable RTLD_DEEPBIND.
+ ldb_ildap: Map some wrong username/password errors on to
LDB_ERR_INVALID_CREDENTIALS
+ pass module init errors back to the caller
+ Return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS rather than OPERATIONS_ERROR on
EACCES and EPERM
+ Fix 1138330 Dereference null return value
+ bad if test in ldb_comparison_fold()
+ use of NULL pointer bugfix
+ Fix CID 241329 Array compared against 0
+ Fix CID 240798 Uninitialized pointer read
+ rdn_name: reject 'distinguishedName' depending of the MOD flags
+ Show the type of failing operation in default error message
+ Do not build libldb-cmdline when using system ldb.
+ ldb_map: Fix CID 1034791 Dereference null return value
+ Fix a const warning

- Verify source tar ball gpg signature.