- Copy stable/10 (r259064) to releng/10.0 as part of the
10.0-RELEASE cycle.
- Update __FreeBSD_version [1]
- Set branch name to -RC1

[1] 10.0-CURRENT __FreeBSD_version value ended at '55', so
start releng/10.0 at '100' so the branch is started with
a value ending in zero.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Traditionally work in the -traditional case.

Submitted by: joerg

Resume deorbit burn sequence for <malloc.h>. Inspection of my make logs
reveals no programs in the standard build which hit the previous warning
message. This change will NOT be merged to 4-stable.

This file is deprecated not "obsoleted".

By Bruce and Joerg suggestions and by looking into June version
of NetBSD simple #include <stdlib.h> into malloc.h
Put #warning that this file is obsoleted ( by Joerg suggestion)

Add malloc.h for better SYSV/Linux compatibility like most
providers (like SUN f.e.) does.
malloc.h have comment about its SYSVism