And populate gids if not sent from slurmctld in the cred.

Now included in the cred instead, no need for SendGIDs
implementation now.

Stop sending them separately.

Force the RPC format used to communicate with slurmstepd to the latest.
(This is separate from the field used to indicate what version the srun
command is expecting to see, so stop conflating the two of them.)

This format is used to setup the slurmstepd, so add the
fields here so they can be send down directly as part of
the launch message instead of as a separate series of
safe_write() calls.

This format is used to setup the slurmstepd, so add the
fields here so they can be send down directly as part of
the launch message instead of as a separate series of
safe_write() calls.

And optionally the ngids and gids. This is still using
PROLOG_FLAG_SEND_GIDS to decide whether to send the gids list,
this will change in a later commit.

getgrouplist() is highly dependent on LDAP performance,
but getgroups() is just lookup up the gids that the process
is operating under.

the list being destroyed right after.

Use --disable-x11 option to configure to turn these flags off,
which will let you use the SPANK plugin instead.

Fix name of macro when enabled to WITH_SLURM_X11.

Only set macro when successful; do not end up with a
config.h line of `#define WITH_SLURM_X11 0` as that would
preclude the use of `#ifdef WITH_SLURM_X11`.

The HAVE_NTR_H macro is already managing this test anyways.

Bug 3070.

This was needed for older versions of MUNGE, but has not been required
since 2010 / 0.5.9.

Deprecate BG/Q and Cray/ALPS modes. You must use --enable-deprecated
to build with these options from now on, or the build will error
out with a warning about the upcoming removal of these platforms.

Bug 4233.

Alter slurmctld to only route federation connections to fed_mgr.c.
While this technically breaks 17.02 <-> 17.11 federation, that is
not a supported configuration anyways (and wouldn't work due to
incomplete functionality in 17.02.)

Currently slurmctld assumes all persistent connection RPCs are
federation; add a persist_type_t field to be able to distinguish
between possible sources of persistent connections and route to
the appropriate subsystem.

Add persist_conn_type_t enum with definitions for currently used
and planned connection types.