libc-client: rename to uw-imap, upgrade to 2007f

* Upgrade to 2007f
* Rename to uw-imap; this is the name used by Fedora and is much more
  sensible than libc-client
* Fix errors when linking the library against code compiled with -fPIC
  such as mod-php (patch from Fedora).
* Add a security patch from Fedora
* Rename files directory to uw-imap

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>