Pull up following revision(s) (requested by manu in ticket #68):
	usr.bin/flock/flock.c: revision 1.9 - 1.11
	usr.bin/flock/flock.1: revision 1.10
Annotate functions using format strings.
Improve Linux compatibility, by making exclusive lock the default.
Also check for file descriptor value being sane.
Pull up following revision(s) (requested by manu in ticket #69):
	sys/kern/subr_tftproot.c: revision 1.13
Fix build with TFTPROOT option enabled
Pull up following revision(s) (requested by christos in ticket #70):
	external/gpl3/gdb/dist/gdb/sparc-nat.c: revision 1.7
Cleanup the confusion with getting the pid of a sparc debugged process.
If the comments were correct, then this should be factored out to the
OS-specific native code, and the general code should remain sane.
Tickets 68 - 70
Pull up following revision(s) (requested by manu in ticket #71):
	lib/libperfuse/ops.c: revision 1.70
We used to remove the trailing zeros in FUSE readlink replies, but
it seems it does not always happen. Just remove them if present.
Ticket 71
Pull up following revision(s) (requested by jmcneill in ticket #72):
	gnu/dist/texinfo/config.guess: revision 1.3
	external/gpl3/gcc/dist/gcc/config.host: revision 1.3
Support building on cygwin64.
Ticket 72