pmix/cray: remove dead code
libfabric: update to ofiwg/libfabric@8da3957de326e6fa2164af71059c04263037e678

Pull down a new embedded copy of libfabric from
https://github.com/ofiwg/libfabric.
libfabric: update embedded libfabric configury

To support the newly-copied libfabric downloaded from github
ofiwg/libfabric@8da3957de326e6fa2164af71059c04263037e678.
libfabric: fix clang compile error in usnic provider

From ofiwg/libfabric@0078c93ae4dc0b299e9b985d62b9a77026574b3c
libfabric: add missing header file
gitignore: trim a lot of kruft

This gitignore was simply the catenation of all the svn:ignore
properties.  However, .gitignore is pretty good at regular expressions
that span the entire tree, so we can consolidate/remove a lot of
redundant entries.
Revert "libfabric: add missing header file"

That wasn't a missing header file; in fact, it should have been
.gitignored!

This reverts commit 35bf5fc60c4970f988e80c7101fd5f27a22ea790.
gitignore: even more regexp ignores

Simple regexps to always ignore the hwloc/libevent stuff, regardless
of their specific version.

Yay regexps!