Merge pull request #6373
eb4f35d depends: bump qrencode to 3.4.4 (Cory Fields)
142ee60 depends: bump protobuf to 2.6.1 (Cory Fields)
d5b1851 depends: bump ccache to 3.2.2 (Cory Fields)
00c5a73 depends: bump miniupnpc to 1.9.20150609 (Cory Fields)
4bdad99 depends: bump boost to 1.58.0 (Cory Fields)