config.h should be included from every .c file, and it should be
included before any other include. Fix that.
(As a side effect of how I did this, this also changes us to
consistently use "config.h" rather than <config.h>. To the extent that
it matters [which is not much], quotes are more correct anyway, since
we're talking about a file in our own build tree, not a system
include.)
Each plugin defined its own error domain, though none actually defined
any errors. Replace these with appropriate uses of
NM_SETTINGS_ERROR_INVALID_CONNECTION and NM_SETTINGS_ERROR_FAILED.
Move the definition of NMSettingsError to nm-errors, register it with
D-Bus, and verify in the tests that it maps correctly.
Remove a few unused error codes, simplify a few others, and rename
GENERAL to FAILED and HOSTNAME_INVALID to INVALID_HOSTNAME, for
consistency.
Instead of handling iBFT (iSCSI Boot Firmware Table) in the ifcfg-rh plugin,
create a new plugin for it. This allows all distributions to use iBFT
configuration, and makes both iBFT handling and ifcfg-rh less complicated.
The plugin (like the old ifcfg-rh code) creates read-only connections backed
by the data exported by iscsiadm. The plugin does not support adding new
connections or modifying existing connections (since the iBFT data is
read-only anyway). Instead, users should change their iBFT data through
the normal firmware interfaces.
Unmanaged devices can be configured through NetworkManager.conf and the
normal 'keyfile' mechanisms.
(In the future, we'll read this data directly from the kernel's
/sys/firmware/ibft/ethernetX directory instead of iscsiadm, since the
kernel has all the information we need and that's where iscsiadm gets
it from anyway.)
https://bugzilla.gnome.org/show_bug.cgi?id=734009
