Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

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

MF9: Don't fail to build if MALLOC_PRODUCTION is defined in make.conf

- Remove debugging from GENERIC* kernel configurations
- Enable MALLOC_PRODUCTION
- Default dumpdev=NO
- Remove UPDATING entry regarding debugging features
- Bump __FreeBSD_version to 1000500

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

Make the malloc(3) family of functions weak and make their non-weak
implementations visible for use by applications. The functions $F that
are now weak symbols are:
allocm, calloc, dallocm, free, malloc, malloc_usable_size,
nallocm, posix_memalign, rallocm, realloc, sallocm

The non-weak implementations of $F are exported as __$F.

Submitted by: stevek@juniper.net
Reviewed by: jasone@, kib@
Approved by: jasone@ (jemalloc)
Obtained from: juniper Networks, Inc

Since our clang now supports the tls_model attribute, remove the
workaround for it in jemalloc_FreeBSD.h.

Reviewed by: jasone

jemalloc: pointer size definition for 64-bit mips platforms

LG_SIZEOF_PTR has to be defined as 3 when jemalloc is compiled for
64 bit platforms.

Reviewed by: juli
Approved by: jasone

Import jemalloc 9ef7f5dc34ff02f50d401e41c8d9a4a928e7c2aa (dev branch,
prior to 3.0.0 release) as contrib/jemalloc, and integrate it into libc.
The code being imported by this commit diverged from
lib/libc/stdlib/malloc.c in March 2010, which means that a portion of
the jemalloc 1.0.0 ChangeLog entries are relevant, as are the entries
for all subsequent releases.