Retire MAP_RENAME and MAP_NORESERVE.

[jhb]

Summary

Retire the unimplemented MAP_RENAME and MAP_NORESERVE flags to mmap(2).
Older binaries are still permitted to use these flags.

[jhb]

This needs to pass an exp-run in ports before it can go into HEAD.

[jhb]

Update truss.

[kib]

I thought that we might want to make the old flags slightly more visible in the output of the tracing tools, to facilitate diagnostic. But I do not have good proposal on how to do this.

[jhb]

Update tree after ports fixes committed.

[jhb]

Closed by commit rS273250 (authored by @jhb).