As discussed during the Open MPI meeting, make ompio the default parallel I/O
library on the trunk in order to expose it to more testing.
Fix the cornercase with MPI_PROC_NULL persistent requests.

This corner case is now handled in the pml so the same code
is invoked for both MPI_Start and MPI_Startall.
This also correctly report an error if MPI_Startall is invoked twice
on a MPI_PROC_NULL persistent request.
Cleanup : fix the cornercase with MPI_PROC_NULL persistent requests.
Ensure that the progress thread tracker properly cleans up the blocking event, if set. Also, use the blocking event to help wake up the progress thread for quick shutdown as some threads can be blocked in a long-running call to select.
When a user asks for cpus/rank > 1 and only has one slot, we need to ensure we always map at least one process when they don't tell us -np

cmr=v1.8.2:reviewer=rhc:subject=correct num_procs in corner case
openmpi.spec: several minor fixes

Thanks to Oliver Lahaye for supplying the patch.
Add support for "double" to the DSS
In case someone wants to use the pstat framework, we need to have the usual open/close functions that were lost in the conversion to the new framework system
coll/ml: set n_resources to 0 when destructing an lmngr

Also keep track of the allocation base so we free the correct pointer
when cleaning up.

cmr=v1.8.2:reviewer=manjugv
opal_path_nfs.c test: skip fuse filesystems

Linux statfs(2) lies about the type of fuse filesystems (it reports
fuse.encfs as an NFS filesystem).  So just skip fuse filesystems in
this test until/if we ever care to add some kind of workaround.

Refs #4767

cmr=v1.8.2:reviewer=rhc
usnic: add btl_usnic_connectivity_map MCA param to output link information

If the btl_usnic_connectivity_map MCA param is set to a non-NULL
value, then each MPI process will output a file named
<prefix>-<hostname>.pid<pid>.job<jobid>.mcwrank<MCW rank>.txt.  Its
contents will detail which usNIC device(s) (and therefore which
link(s)) are being used to communicate with each peer MPI process.

Here is a sample output file (named
mpi005.pid26071.job1640759297.mcwrank0.txt):

{{{
device=usnic_0,interface=eth4,ip=10.10.0.5/16,mac=24:57:20:05:20:00,mtu=9000
device=usnic_1,interface=eth5,ip=10.2.0.5/16,mac=24:57:20:05:21:00,mtu=9000
device=usnic_2,interface=eth6,ip=10.3.0.5/16,mac=24:57:20:05:50:00,mtu=9000
peer=1,hostname=mpi006,device=usnic_0@peer_ip=10.10.0.6/16@peer_mac=24:57:20:06:20:00,device=usnic_1@peer_ip=10.2.0.6/16@peer_mac=24:57:20:06:21:00,device=usnic_2@peer_ip=10.3.0.6/16@peer_mac=24:57:20:06:50:00
peer=2,hostname=mpi007,device=usnic_0@peer_ip=10.10.0.7/16@peer_mac=24:57:20:07:20:00,device=usnic_1@peer_ip=10.2.0.7/16@peer_mac=24:57:20:07:21:00,device=usnic_2@peer_ip=10.3.0.7/16@peer_mac=24:57:20:07:50:00
peer=3,hostname=mpi008,device=usnic_0@peer_ip=10.10.0.8/16@peer_mac=24:57:20:08:20:00,device=usnic_1@peer_ip=10.2.0.8/16@peer_mac=24:57:20:08:21:00,device=usnic_2@peer_ip=10.3.0.8/16@peer_mac=24:57:20:08:50:00
}}}

Reviewed by Reese Faucette

cmr=v1.8.2
mca_base_var: use ERR_NOT_FOUND when var is inactive

After discussion with Nathan, change the ERR_VALUE_OUT_OF_BOUNDS to be
ERR_NOT_FOUND, for two reasons:

1. It's consistent with other uses of ERR_NOT_FOUND in the code.
1. In this case, we could have just looked up a variable that is
   basically a "hole" -- e.g., var indexes 0, 1, 2 are valid, and 4,
   5, and 5 are valid, but 3 is invalid (e.g., 3 was de-registered --
   remember that MPI_T explicitly does not allow re-using indexes).
   So returning ERR_OUT_OF_BOUNDS seems weird -- returning
   ERR_NOT_FOUND seems a bit more natural.

cmr=v1.8.2:ticket=#4587
btl_usnic_map.c: Arrgh!  Forgot to svn add this file.

cmr=v1.8.2:ticket=#4773
osc/rdma: check for more types of window access violations

This commit adds a check to see if the target is in an access epoch. If
not we return OMPI_ERR_RMA_SYNC. This fixes test_start3 in the onesided
test suite. The cost of this extra check is 1 byte/peer for the boolean
flag indicating that the peer is in an access epoch.

I also fixed a problem where mupliple unexpected post messages are not
correctly handled.

cmr=v1.8.2:reviewer=jsquyres
mpit: update the return code check for mca_base_var_get

mca_base_var_get now can return OPAL_ERR_NOT_FOUND if a variable no
longer exists. This commit updates the return code check to ensure
the correct MPI_T error code is returned to the user.

cmr=v1.8.2:reviewer=jsquyres
fortran: fix MPI_Win_allocate_shared and MPI_Win_shared_query

Several problems with MPI_Win_allocate_shared and MPI_Win_shared_query
were discovered in a code review.  This commit fixes them:

* Add _cptr versions of both subroutines in mpif-h, use-mpi-tkr, and
  use-mpi-ignore-tkr directories
* Fix case of PMPI weak symbols for both C implementations
* Add MPI and PMPI f08 implementations of both subroutines (there is
  no _cptr version in the mpi_f08 module)
* Fixed _f08 suffix on the f08 module of both subroutines

cmr=v1.8.2:ticket=#4736
Opal: add a new MCA parameter that allows the user to specify a list of environment variables. This parameter will become the standard mechanism by which environment variables are set for OMPI applications replacing the -x option.   

mpirun ... -x env_foo1=val1 -x env_foo2 -x env_foo3=val3  should now be expressed as

mpirun ... -mca mca_base_env_list env_foo1=val1+env_foo2+env_foo3=val3. 

The motivation for doing this is so that a list of environment variables may be set via standard MCA mechanisms such as mca parameter files, amca lists, etc. 

This feature was developed by Elena Shipunova and was reviewed by Josh Ladd.
VERSION: remove libmpi_usempi_ignore_tkr_so_version; it isn't used anywhere
Opal: Add a new MCA variable type "version_string". Also add a 
new flag to ompi_info that allows a user to print all MCA variables of a specific type.  

 --type version_string

This command will print all MCA variables of type version_string.

This feature was developed by Elena Shipunova and was reviewed by Josh Ladd.
opal: revert env_list separator to ";" from "+"