$ find * -type f |xargs perl contrib/scripts/spdx.pl
  $ git rm contrib/scripts/spdx.pl

WARNING: Project targetting '>= 0.44.0' but tried to use feature
introduced in '0.50.0': install arg in configure_file

From the documentation:

 "install (added 0.50.0) When true, this generated file is installed
 during the install step, and install_dir must be set and not
 empty. When false, this generated file is not installed regardless of
 the value of install_dir. When omitted it defaults to true when
 install_dir is set and not empty, false otherwise."

The parameter can be omitted because install_dir is set.

https://gitlab.freedesktop.org/NetworkManager/NetworkManager/issues/216

If the dispatcher is being invoked because the connection was removed
(e.g. device going down), it doesn't have a path or a filename anymore.
Don't abort in such cases.

https://gitlab.freedesktop.org/NetworkManager/NetworkManager/merge_requests/205

Some linux distros (e.g., RHEL, CentOS and Fedora) ship a dispatcher
script with their dhclient package in order to run user dhclient hook
scripts also when connections are run by NetworkManager.
The scripts convert the var names in the environment to the ones
expected in the dhclient hook scripts.
This feature is currently use by cloud-init to retrieve the MS Azure
server endpoint address, which is sent in the private dhcp option 245.
We just redefined the default dhclient var names for the private options
from "unknown_xyz" to "private_xyz". In order to let current cloud-init
version to be able to retrieve the Azure server endpoint address, add
the legacy var name "unknown_245" to the dispatcher script environment.

We no longer add these. If you use Emacs, configure it yourself.

Also, due to our "smart-tab" usage the editor anyway does a subpar
job handling our tabs. However, on the upside every user can choose
whatever tab-width he/she prefers. If "smart-tabs" are used properly
(like we do), every tab-width will work.

No manual changes, just ran commands:

    F=($(git grep -l -e '-\*-'))
    sed '1 { /\/\* *-\*-  *[mM]ode.*\*\/$/d }'     -i "${F[@]}"
    sed '1,4 { /^\(#\|--\|dnl\) *-\*- [mM]ode/d }' -i "${F[@]}"

Check remaining lines with:

    git grep -e '-\*-'

The ultimate purpose of this is to cleanup our files and eventually use
SPDX license identifiers. For that, first get rid of the boilerplate lines.

Otherwise we can get a build failiure:

  ../libnm/NetworkManager.h:61:27: fatal error: nm-enum-types.h: No such file or directory

We don't need it anymore.

Still, for tests let gdbus-codegen run and generate the sources and
compile them. We want to keep "dispatcher/nm-dispatcher.xml" and ensure
that it is still valid.