mod_rayo: add new config pause-when-offline - will pause inbound calling if there are no online clients to handle calls.  This is useful if you want FS to respond 503 to options ping when there are no online rayo clients.  Default behavior is to disable this param.

FS-6287 --resolve When a broken registrar sends a 401 unauth then replies with a subsequent 401 unauth without the stale=true attribute, sofia tries to invalidate the auth handle and get stuck in a state where it cannot recover until the reg handle is destroyed.  In this case, the provider in question has a bug on thier end when the nonce count rolls from nc=000000ff to nc=00000100 they start sending several consecitive 401 rather than a 401 with stale=true or a 403.  This change will allow it to reset properly and try again with nc=00000001 on the next try.

https://github.com/ember-addons/bootstrap-for-ember/issues/98

FS-6355 - Patch to have .fsxml file be generated atomic to avoid partial reads when using this file to compare to previous versions/etc.

FS-6211 revert 015ff5d7 and f6e591de in favor of doing it in apr

FS-6352: --resolve don't override install target when using automake, make your own install target that will get depended upon instead

Because FS will build against the system libcurl if it's there, this
results in us building against the system library.