Support OpenMP needs of mumps

Style change: rename comm_mumps to mumps_comm, size to petsc_size

Improve uses of mumps->id.lsol_loc

1) mumps->id.INFO(23) was set by MUMPS in the numeric factorization phase and we stored in mumps->id.lsol_loc.
We can reuse mumps->id.lsol_loc
2) Length of mump

Improve uses of mumps->id.lsol_loc

1) mumps->id.INFO(23) was set by MUMPS in the numeric factorization phase and we stored in mumps->id.lsol_loc.
We can reuse mumps->id.lsol_loc
2) Length of mumps->id.isol_loc[] is lsol_loc (MUMPS-5.1.2 Manual, page 46), not nrhs*lsol_loc. We do not need to
allocate excessive memory

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Fix a typo

Removed trailing spaces

Merge remote-tracking branch 'origin/maint'

MatMumps: log flops for factorization and elimination

MatMumps: small fix to MatView

MatMumps: no need to call the Schur support for zero sized Schur complements

fix warning reported by the nightly tests

add missing statements

add MatMatTranspose()

add MatMatTransposeSolve_MUMPS() -- not fully implemented yet.

fix communicator in SETERRQ(), as suggested by Stefano

cleanup MatMatSolve_MUMPS()

add support for parallel sparse RHS (in host) for MatMatSolve_MUMPS()
Requested-by: Marius Buerkle <mbuerkle@web.de>

Man pages: add newlines after "Notes:"

This allows for proper formatting from sowing.

On OS X (using gsed, not the default BSD sed), from the PETSc root directory:

find src include -type f \(

Man pages: add newlines after "Notes:"

This allows for proper formatting from sowing.

On OS X (using gsed, not the default BSD sed), from the PETSc root directory:

find src include -type f \( -name "*.c" -or -name "*.h" -or -name "*.cxx" \) | xargs gsed -i 's/Notes\s*:\s*\(\w.*\)/Notes:\n \1/'

This adds a newline and 4 spaces whenever "Notes:" is followed by any "word" character, in any .c, .h, or .cxx file in src/ or include/

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