Always ignore the deprecated MAP_RENAME and MAP_NORESERVE flags to mmap().
Some old libraries may be used even with newer binaries (specifically the
Nvidia driver libraries).

Differential Revision:	https://reviews.freebsd.org/D1262
Reviewed by:	kib


git-svn-id: svn+ssh://svn.freebsd.org/base/head@275514 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f