"shared/nm-utils" contains general purpose utility functions that only
depend on glib (and extend glib with some helper functions).
We will also add code that does not use glib, hence it would be good
if the part of "shared/nm-utils" that does not depend on glib, could be
used by these future projects.
Also, we use the term "utils" everywhere. While that covers the purpose
and content well, having everything called "nm-something-utils" is not
great. Instead, call this "nm-std-aux", inspired by "c-util/c-stdaux".
Supporting a trailing comma in NM_MAKE_STRV() can be desirable, because it
allows to extend the code with less noise in the diff.
Now, there may or may not be a trailing comma at the end.
There is a downside to this: the following no longer work:
const char *const v1[] = NM_MAKE_STRV ("a", "b");
const char *const v2[3] = NM_MAKE_STRV ("a", "b");
but then, above can be written more simply already as:
const char *const v1[] = { "a", "b", NULL };
const char *const v2[3] = { "a", "b" };
so the fact that the macro won't work in that case may be preferable,
because it forces you to use the already existing better variant.
"shared/nm-utils" is a loose collection of utility functions.
There is a certain aim that they can be used independently.
However, they also rely on each other.
Add a test that we can build a minimal shared library with
these tools, independent of libnm-core.
