LU-6245 libcfs: move cfs_ip_addr_* function from kernel libcfs to LNet

LU-6245 libcfs: move cfs_ip_addr_* function from kernel libcfs to LNet

Both of cfs_ip_addr_parse and cfs_ip_addr_match which are located in
libcfs kernel module are used only for LNet so move this into the
nidstring handling code where it belongs. Also create user land
versions of these functions in the libcfs user land library.

Signed-off-by: James Simmons <uja.ornl@yahoo.com>
Change-Id: Idb1be9c6ab3328f2f85e92847b5a367d91a903da
Reviewed-on: http://review.whamcloud.com/15085
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-by: frank zago <fzago@cray.com>
Tested-by: Jenkins
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>