Made the packet sequence number handling automatic so that it always uses
the correct one.
All functions now have documentation in them. Cleaned up code and added
comments to GSSAPI code.
Added FindGSSAPI.cmake which allows the modules to be built only if the
libraries are found.
The log manager header was not included by the GSSAPI modules.
- Headers now to be included as <maxscale/xyz.h>
- First step, no cleanup of headers has been made. Only moving
from one place to another + necessary modifications.
Authenticators now have a similar mechanism to the `router_options`
parameter which enables configurable authentication.
The authenticators also have a new initialize entry point which is similar
to the createInstance entry point of the filters and routers. The value of
`authenticator_options` is passed as a parameter to this function. The
return vaulue of the `initialize` entry point is passed to the `create`
entry point.
The GSSAPI backend authentication is based on tokens. The server first
sends the service principal name which is used for token generation. The
client then retrieves a token from the GSSAPI server which it sends to the
backend server. If the server can verify the authenticity of the token,
authentication is successful.
This module can be used with both GSSAPIAuth and MySQLAuth modules.
Initial implementation of the client side GSSAPI authenticator. The
current version successfully authenticates clients using the same style as
the MariaDB GSSAPI plugin does. Currently, it is not possible to acutally
use the plugin as the backend server would require the matchig GSSAPI
plugin.
Also added skeleton code for the backend GSSAPI authenticator. It only
implements the required entry points and sends the client auth packet to
the backend.
