SH-4312 Clumsy configuration coordination between mesh and corehttp

Taught llappcorehttp to register signals on the settings values
that chagne behavior.  Have initialization and settings changes
sweep through settings and change them.  Dynamic changes are tried
but have no effect (produce a warning message) as dynamic settings
still aren't supported but the plumbing is now connected.  Just
need to change llcorehttp.  Bounced the 'teleport started' signal
around and it ended up back where it started with some cleanup.
This is making me less angry...