We need to ensure that configure fails with an error if the popt
development libraries are not present or if ldb module support is
not available.

A new nss_parse_name function uses pcre to parse names, this makes
it possible, in future, to make the filter user configurable.

Add a new filter mechanism to filter out users that uses the negative cache by
setting a permanet negative entry.

Rework the entry points where the negative cache is checked for.

dependencies based on the latest samba code.
Convert all references to the old events library to use the
renamed tevent library.

Also move responders under server/responder with shared code
in server/responder/common

Signed-off-by: Simo Sorce <ssorce@redhat.com>

Adding support for generating RPMS for sssd.

Fixing TDB autoconf macros to require version 1.1.3
and support for the tdb_repack symbol (required by LDB)
Updating tdb.h to #include <sys/stat.h> for proper autoconf

Build system modifications to simplify RPM generation

Fixing RPM build system as recommended during code review
Minor tweaks to Makefile and sssd.spec
Make policykit and infopipe configurable
Soname and symlinks

events.h -> tevent.h