Fix 2585 and clean up warning in contributing.rst
Removes duplicate changelog entry
setup network when reconnecting to ghost container

Re-adding the line to setup the network when reconnecting to a ghost
container.  It was inadvertently removed by commit
31638ab2ad2a5380d447780f05f7aa078c9421f5.
Merge pull request #2611 from seancron/changelog-edit

Removes duplicate changelog entry
Fix 2585, rebase to master
Merge pull request #2615 from jpoimboe/ghost-networking-fix

setup network when reconnecting to ghost container
Merge pull request #2590 from metalivedev/2585-addphplib

Fix 2585 and clean up warning in contributing.rst
Remove mkimage-centos.sh in favor of a new rinse-based script, since febootstrap is fragile and picky