With this we'll print a marker "----- Reboot -----" between two
subsequent lines with different boot IDs.

There's now sd_journal_new_directory() for watching specific journal
directories. This is exposed in journalctl -D.

sd_journal_wait() and sd_journal_process() now return whether changes in
the journal are invalidating or just appending.

We now create inotify kernel watches only when we actually need them

This helps explaining when the log output of "systemctl status" is
incomplete because the logs got rotated since the service was started.

This brings journalctl's built-in usage output in sync with the man page.
There are no commands to pass, and the help screen should not confuse
users.

We finally got the OK from all contributors with non-trivial commits to
relicense systemd from GPL2+ to LGPL2.1+.

Some udev bits continue to be GPL2+ for now, but we are looking into
relicensing them too, to allow free copy/paste of all code within
systemd.

The bits that used to be MIT continue to be MIT.

The big benefit of the relicensing is that closed source code may now
link against libsystemd-login.so and friends.

There is a 'break' missing in the -q handling
so, for example, 'systemd-journalctl --new-id128 -q'
does nothing.

This patch fixes the problem.