Merge pull request #9 from strahlex/rebase-mk-may02

Rebase mk may02
zerconf_resolve: shutdown properly
rtapi_msgd: remove websockets proxy code
webtalk: pass 0
webtalk pass 2, before fixing tx flow control
webtalk pass 4 -- flow control ok
fix realtime
build fixes
msgd: reintroduce subscriber log
rtapi/Submakefile: delete fluff
zeroconf_resolve: tone down
rundemo: fixup
before switch to avahi native
hal_glib/gladevcp: avahi service discovery

drop dubious pybonjour
motorctrl.ui: add status label
added configserver to demo run file
haltalk: fix logging during startup
hal_glib: ignore per-interface announcements
avconfigserver: rewrite to avoid pybonjour

standardize on avahi/python-avahi
Makefile: install configserver, avconfigserver