First series of patches upstreamed

Committed upstream on 2012-06-10,
see 49b8e72012f8baa and beyond
Second series of patches upstreamed

Commited upstream on 2012-06-10
see c9677ed83c948
rework 012-mempcpy-arping.patch for upstreaming
rework 016-swapon-swapoff.patch for upstreaming
mempcpy correction
rework 017-ipcs-ipcrm.patch
rework 018-syslogd-logread.patch
rework 019-fsck.minix-mkfs.minix.patch
rebase 020-microcom.patch
fix 025-readahead.patch
rebase 026-modinfo-modprobe-without-utsrel.patch
050-dietlibc: remove 2 EOF whitelines
rebase 051-ash-history.patch
003-mount, whitespace fixes
017-*: fix order
Merge branch 'rebase_master'

rebase after upstreaming 2 series of patches

series1:
021 defconfig
028 bb_additional_path
001 (syscall, rewrite: add def, in platfrom?)
002 (ifdef android)
014-inetd
013-brctl

series2:
004 kill
005 date
006 pivot_root
007 hostname
008 adjtimex
add lsof to configs (new option in bb master)
[fix] segmentation error when df with arguments
Docs: when cherry-picking always add patches with a lower patch-number as well; patches can depend on earlier patches
Bump configs to 1_21_0