Apply patch (requested by mrg in ticket #1499):

src/compat version 2.  this allows building any number of alternate
library / program target ABIs.  rather than duplicating the list of
subdirs and Makefiles to build, it re-traverses the necessary ones.
details:
- add support for MAKEDIRTARGETENV to share/mk
- renames LD32DIR to MLIBDIR
- fixes library builds for some subdirs (more was built than needed)
- fixes /bin & /sbin apps in compat mode
- reduces complexity in src/compat and the rest of the tree
- updates ldd netbsd32 support
Ticket 1499.
Apply patches (requested by spz in ticket #1517):

Update bind to 9.7.2-P3.
Ticket 1517.
Apply revision 1.2 of external/bsd/bind/dist/lib/isc/backtrace.c, to
fix pullup ticket #1517.
Pull up following revision(s) (requested by uwe in ticket #1500):
	sys/arch/vax/vax/clock.c: revision 1.54
	sys/arch/vax/include/clock.h: revision 1.8
Correct definition of leap year.  Make yeartonum and numtoyear use
full years so that year 2000 is correctly counted as a leap year.
Now NetBSD under SIMH picks up correct time-of-day clock value.  It
used to be a day behind, since 2000 - 1900 = 100 and naive leap year
test wouldn't count it as a leap year.
Pull up following revision(s) (requested by tron in ticket #1519):
	etc/rc.d/named: revision 1.21
	etc/rc.d/named: revision 1.19
Adjust for new default location of the pid file.
handle new directory structure.
Tickets 1500, 1519.
Apply patch (requested by tron in ticket #1501):

	Update Postfix to version 2.7.2:
	- Postfix no longer automatically appends the system default CA
	  (certificate authority) certificates, when it reads the CA
	  certificates specified with {smtp, lmtp, smtpd}_tls_CAfile or
	  with {smtp, lmtp, smtpd}_tls_CApath.  This prevents third-party
	  certificates from getting mail relay permission with the
	  permit_tls_all_clientcerts feature.  Unfortunately, this change
	  may cause compatibility problems with configurations that rely
	  on certificate verification for other purposes.  To get the old
	  behavior, specify "tls_append_default_CA = yes".
	- A prior fix for compatibility with Postfix < 2.3 was incomplete.
	  When pipe-to-command delivery fails with a signal, mail is now
	  correctly deferred, instead of being returned to sender.
	- Poor smtpd_proxy_filter TCP performance over loopback (127.0.0.1)
	  connections was fixed by adapting the output buffer size to the
	  MTU.
	- The SMTP server no longer applies the reject_rhsbl_helo feature
	  to non-domain forms such as network addresses.  This would cause
	  false positives with dbl.spamhaus.org.
	- The Postfix SMTP server failed to deliver a "421" response and
	  hang up the connection after Milter error.  Instead, the server
	  delivered a "503 Access denied" response and left the connection
	  open, due to some Postfix 1.1 workaround for RFC 2821.
	- The milter_header_checks parser failed to enable any of the actions
	  that have no effect on message delivery (warn, replace, prepend,
	  ignore, dunno, and ok).
Ticket 1501.
Pull up following revision(s) (requested by pooka in ticket #1502):
	sys/dev/rnd.c: revision 1.79
Don't allow "goes to 11^H^Hhyperspace" len field for RNDADDATA.
Pull up following revision(s) (requested by bouyer in ticket #1503):
	sys/arch/xen/conf/files.xen: revision 1.110
Make maxpartitions 16 on !i386. Fixes hardwiring root on device autoconf
index > 0 on amd64. Problem reported and patch tested by Tobias Nygren.
tickets 1502, 1503.
Pull up following revision(s) (requested by enami in ticket #1504):
	share/man/man8/rc.subr.8: revision 1.27
	etc/rc.subr: revision 1.86
	share/man/man5/ifconfig.if.5: revision 1.14
	etc/rc.d/network: revision 1.61
Add a collapse_backslash_newline function to rc.subr.
Collapse <abckslash><newline> sequences in /etc/ifconfig.xxx files read
by /etc/rc.d/network.  Fixes PR 41662 by Christoph Badura, which was
also reported independently by Jeremy C. Reed.
Pull up following revision(s) (requested by pgoyette in ticket #1505):
	sys/dev/sysmon/sysmon_envsys_events.c: revision 1.94
Make this compile when "options ENVSYS_OBJECTS_DEBUG" is defined.
Tickets 1504, 1505.
Pull up following revision(s) (requested by hauke in ticket #1506):
	sys/dev/sbus/spif.c: revision 1.19
Fix warning about missing initializer that showed up in sparc64
builds, but, strangely enough, not in sparc builds.
Relevant for netbsd-{4,5} release branches.
Pull up following revision(s) (requested by is in ticket #1507):
	external/bsd/top/dist/display.c: revision 1.9
PR/43562: Witold Jan Wnuk: top: CPU percentages overlap labels
Tickets 1506, 1507
Pull up following revision(s) (requested by bouyer in ticket #1515):
	usr.sbin/nfsd/nfsd.c: revision 1.57
PR/42486: Ed Ravin nfsd sometimes exits prematurely during port-scan fix
from freebsd bin 61084 applied (preserving errno properly). The accept
code should be merged.