Backported to v0.4: Fixing reverse packet matches bug in ARP values for OF1.2/OF1.3
Merge remote-tracking branch 'origin/devel-0.4' into devel-0.5

Conflicts:
	CHANGES
	src/xdpd/openflow/openflow12/of12_translation_utils.cc
	src/xdpd/openflow/openflow13/of13_translation_utils.cc
Merge remote-tracking branch 'origin/devel-0.5' into devel-0.6
Small changes to adapt xdpd compilation to LLVM
Fixing tests: errors for clang compilation