opensm 3.3.23

Changes since 3.3.22:
Add support for registering an opensm plugin as a new routing engine
Internal improvements and bug fixes as noted below and in release notes

See https://github.com/linux-rdma/opensm/tree/master/doc/opensm_release_notes-3.3.txt

Full list of changes is below:

Nicolas Morey-Chaisemartin (6):
osm_opensm.c: Fix use of enum as NULL pointer in osm_opensm_init_finish
osm_ucast_ftree.c: Fix clang warning about empty loop
osm_[port ucast_ftree].c: Remove unused static functions
Add travis validation
travis: Add patch check
ib_types: Drop packed attribute where unnecessary

Tamir Ronen (3):
Update shared (internal) library versions in accordance with changes since OpenSM 3.3.22
configure.ac: Update package number for OpenSM to 3.3.23 for release
Update opensm_release_notes-3.3.txt

Hal Rosenstock (2):
opensm.spec.in: Updated for move to github
opensm.spec.in: Move COPYING back into doc

Benjamin Drung (1):
Fix spelling mistake of "switches"

Cyrille Verrier (1):
Add support for registering an opensm plugin as a new routing engine