Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.Prune svn:mergeinfo from the new branch, as nothing has been mergedhere.Additional commits post-branch will follow.Approved by: re (implicit)Sponsored by: The FreeBSD Foundation
Match the implementation of the inline function from libkern.h.
Add local ptototype for memset function.
Add trivial MI memset function implementation. GCC mandates theexistence of this function as a linkable symbol in standaloneconfigurations and existing inline memcpy from libkern.h failsthis requirement.