logs-show: fix corrupt output with empty messages

If a message had zero length, journalctl would print no newline, and
two output lines would be concatenated. Fix. The problem was
introduced in commit 31f7bf199452 ("logs-show: print multiline
messages"). Affected short and verbose output modes.

Before fix:

Feb 09 21:16:17 glyph dhclient[1323]: Feb 09 21:16:17 glyph NetworkManager[788]: <info> (enp4s2): DHCPv4 state changed nbi -> preinit

after:

Feb 09 21:16:17 glyph dhclient[1323]:
Feb 09 21:16:17 glyph NetworkManager[788]: <info> (enp4s2): DHCPv4 state changed nbi -> preinit
journalctl: refuse extra arguments with --verify and similar

Positional arguments only make sense with the default action.
For other actions, complain instead of ignoring them silently.
hwdb: keymaps for Samsung 900X3E/900X3F

Keymaps for Samsung 900X3E and 900X3F should be the same as for other
models in the series.

I have also moved the comment for '# Series 9' to the right place
build-sys: Do not distribute generated udev service files

They are already in nodist_systemunit_DATA and if they are
shipped, they contain hardcoded paths to udevadm and
systemd-udevd which will cause them to fail to start when
rootprefix != prefix and rootlibdir != libdir.
autogen: Allow running autogen from a builddir != srcdir

While the configure correctly supports being run outside of
the top source directory by default, it's nice if autogen.sh
does too:

 $ git clone git://anongit.freedesktop.org/systemd/systemd
 $ cd systemd
 $ mkdir $(uname -m)
 $ cd $(uname -m)
 $ ../autogen.sh a
 $ make
cdrom_id: use the old MMC fallback

https://bugzilla.redhat.com/show_bug.cgi?id=1038015
The problem seems to be that the your virtual DVD is emulating a really
old DVD device, and doing it kind of strangely.

> dracut:# /lib/udev/cdrom_id --debug /dev/sr0
> probing: '/dev/sr0'
> INQUIRY: [IMM     ][Virtual CD/DVD   ][0316]
> GET CONFIGURATION failed with SK=5h/ASC=24h/ACQ=00h

So your virtual drive rejects the GET CONFIGURATION command as illegal.

Other pre-MMC2 drives that don't accept this command usually return the
error
SK=5h,ASC=20h (invalid/unsupported command code), in which case cdrom_id
tries an older method, and then ID_CDROM_MEDIA_TRACK_COUNT_DATA gets set
and all the /dev/disk/by-label (etc) links get set up.

The virtual drive returns the error SK=5h,ASC=24h (invalid field in
Command Descriptor Block), which cdrom_id doesn't handle, so it gives up
and the links never get made.

The ideal solution would be to make the IMM to emulate a device that's
less than 15 years old, but I'm not going to hold my breath waiting for
that.

So probably cdrom_id should also use the old MMC fallback when the error
is SK=5h,ASC=24h, and then all of this would work as expected.

Suggested-by:Luca Miccini <lmiccini@redhat.com>
udev/rules: setup tty permissions and group for sclp_line, ttysclp and 3270/tty
sd-network: add new library

This is similar to sd-login, but exposes the state of networkd rather than logind.

Include it in libsystemd-dhcp and rename it to libsystemd-network.
networkd: add networkd-wait-online

This is mostly a proof of concept to try sd-network, so we don't
hook it up with a .service file quite yet. We probably want it to
be more clever about deciding when we are 'online'.

The binary  will wait for at least one network managed by networkd,
and until all networks managed by networkd are configured.
architecture: Add tilegx

Add Tilera's TILE-GX processor family support.
sd-network: fix header
sd-network: turn states 'unknown' and 'unmanaged' into errnos
nspawn: fix detection of missing /proc/self/loginuid

Running 'systemd-nspawn -D /srv/Fedora/' gave me this error:
 Failed to read /proc/self/loginuid: No such file or directory

 Container Fedora failed with error code 1.

This patch fixes the problem.
bash: add completion for systemd-nspawn
update TODO
Update gitignore
build-sys: distribute kdbus documentation
TODO
add bash completion for systemd-cgls
networkd-wait-online: use automatic cleanup