pbuilderrc:  don't use qemu when on native ARM
Makefile:  only build native arches by default
ppa config template:  just include all architectures, no template
linux-tools module updates:  remove Build-Dep: libunwind7-dev

Not available in ARM
pyzmq:  fix list of generated packages
czmq module update:  Michael's patch for slow architectures
Lower libsodium rev

In case libsodium can be accepted upstream
Rename module linux-dev -> rcn-linux-arm
WIP:  Fix up featuresets for new makefile structure