Import of code from heimdal

This commit updates the code imported from heimdal to
5dfaa0d10b8320293e85387778adcdd043dfc1fe (git2svn-syncpoint-master-311-g5dfaa0d)

New files are:
	roken/freeaddrinfo.c
	roken/gai_strerror.c
	roken/getaddinfo.c
	roken/getnameinfo.c

Change-Id: I4a80dfd0d95cfd252af5ce3228fb824b4aacb961
Reviewed-on: http://gerrit.openafs.org/11198
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: D Brashear <shadow@your-file-system.com>