contrib/vim: add missing noinput command to syn match

[kmk3]

Added on commit a90386d ("Map /dev/input with "--private-dev", add
"--no-input" option to disable it") / PR #4209. See also commit
0cee0ba ("Add noinput to all profiles with private-dev") / PR #4239.

Misc: I noticed that it was missing due to the lack of syntax
highlighting on etc/profile-m-z/webstorm.profile.

Cc: @davidebeatrici (as the author of #4209)

[rusty-snake]

FWIW: dbus-* has no highlighting too.

[kmk3]

Sorry for the late reply, I've been AFK.

FWIW: dbus-* has no highlighting too.

Good catch. This one is more complicated as it has 3 different forms and
arguments (compared to noinput having a single form with no arguments):

dbus-(user|system) (filter|none)
dbus-(user|system).(own|talk|see) name
dbus-(user|system).(call|broadcast) callrule

The commands/subcommands can be matched basically as is above, but validating
the arguments is not so easy. Looking at profile.c and dbus.c, I managed to
turn check_bus_or_interface_name into a regex for name:

grep -E '^(\*|[A-Za-z_-][A-Za-z0-9_-]*(\.[A-Za-z_-][A-Za-z0-9_-]*)*((\.[A-Za-z_-][A-Za-z0-9_-]*)+|\.\*))$'

It seems to match the behavior of the function in all the tests that I came up
with, but it looks quite gigantic and the dbus_check_call_rule function
(for callrule) is even more complex than the former (though the regex above
can probably be reused in a nextgroup=).

I could also just make the arguments match .*; not sure if half-highlighting
better or worse than no highlighting.

I think I'll try it in a new PR, but feel free to discuss it here in the
meantime.

[rusty-snake]

All newly added commands/conditions since a1cc4a5 (I found): dbus-*, seccomp-error-action, seccomp.32*, allow-debuggers, ?HAS_NOSOUND, ?HAS_X11, ?HAS_NET, private-cwd

[kmk3]

All newly added commands/conditions since
a1cc4a5
(I found): dbus-*, seccomp-error-action, seccomp.32*,
allow-debuggers, ?HAS_NOSOUND, ?HAS_X11, ?HAS_NET, private-cwd

Good catch. Would you mind creating an issue/task for that (and ideally
another just for dbus-*, as it seems much more complex)? This would help
make it more visible and ensure that it does not get lost over time. And I'd
really like to archive finished PRs/issues as "done", in order to unclutter the
inbox.

In a similar vein, I plan on moving some scattered ideas from my comments to
issues for the same reasons.

Additionally, I have some other branches that I'm working on in the meantime,
so if you want to do the changes, feel free to do so.