libfdisk: make first sector buffer usage more robust

	$ ~/util-linux/fdisk -b 4096 xxx
	..
	Segmentation fault

The buffer has to be reinitialized always when we apply a new
device properties (e.g. sector size).

Reported-by: Bernhard Voelker <mail@bernhard-voelker.de>
Signed-off-by: Karel Zak <kzak@redhat.com>
whereis: fix missing newline on empty results

Running "whereis foo.bar.quux" previously resulted in
printing the "foo.bar:" pattern prefix without any
newline following it.

Signed-off-by: Andreas Henriksson <andreas@fatal.se>
docs: fix many wording and some formatting issues in the man page of kill

Also, add the most-used form of '-signal' to the synopsis.

Signed-off-by: Benno Schulenberg <bensberg@justemail.net>
build-sys: improve the informative message when not building some util

Signed-off-by: Benno Schulenberg <bensberg@justemail.net>
kill: use --queue option argument as sigval integer value

The sigqueue(3) takes two values, signal and sigval.  Contents of the
signal can be altered with --signal option argument, so the --queue
argument should be reserved to affect sigval_int.

This is regression fix introduced by commit
9e8dffd5cd29f03029b1ac99eecb129532ca5c0f.

Reference: http://man7.org/linux/man-pages/man3/sigqueue.3.html
Reported-by: Benno Schulenberg <bensberg@justemail.net>
Signed-off-by: Sami Kerola <kerolasa@iki.fi>