if we get garbage from the RTC try again a couple times
this seems to happen more frequently when the PRAM battery goes bad
PR/49109: Jeremie Le Hen: fix sed relative addressin (1,+N)
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=192108
http://svnweb.freebsd.org/base?view=revision&revision=269302
XXX: pullup 7.
Interleave 0 means concatenate serially, do not interleave.
This information was in the ccd(4) man page, but not
in ccdconfig(8) or ccd.conf(5).
remove unused variable, as reported by Brad Harder
update to r1.377 from upstream, commit message from ragge:

Allow for use of restrict in array declarations (as gcc does).
Fixes gnu regex compilation as reported by William D. Jones on
NetBSD current-users.
Add missing TP so that -a is not hidden in the -A description.
From Anon Ymous.
- Add a map of active controlling ptys per mount and no longer abuse
  the vnode lifecycle.
- No longer set "recycle" on VOP_INACTIVE().
- Make ptyfs_used_get() private to ptyfs_subr.c
- Stop copying device attributes from traditional ptys on first allocation.
- Remove unneeded argument "lwp" from ptyfs_allocvp() and ptyfs_free_get().

OK: Christos Zoulas
Interleave 0 means concatenate serially, do not interleave.
This information was in the ccd(4) man page, but not
in ccdconfig(8) or ccd.conf(5).
Don't use config_deferred_interrupts() for vioif_deferred_init(),
just run it once as part of if_init().  The problem with the former
is that it will execute the deferred init routine in-place when !cold,
and since vioif_deferred_init() finishing depends on virtio interrupts
which are established only after config_deferred_interrupts() is called,
the vioif attach method would deadlock when !cold.
powerpc64 uses the same sources as powerpc and needs the long double as
double-double sources.
Use the lint path as workaround for Clang on 32bit PPC for now.
Document this hack.
Add component for the pcnet PCI driver to rump kernels.  Virtualbox
emulates it by default, so it's nice-to-have for that.
Fix for PR/49061
only kassert in pmap_kenter_pa if PMAP_CACHE_PIVT && !ARM_MMU_EXTENDED
Spell LdAddr consistently
[] -> ()
Adapt to reality -- already open BSD style nodes do not appear on
ptyfs mounts (this changed some months ago).
Build position independent on PPC64, too.
Add formatting for aarch64 as using arm ones errors for ll on 64 bit types
Respect EXTERNAL_TOOLCHAIN on aarch64
Use __ATOMIC_RELAXED in __cpu_simple_lock_init