FS-11680: [mod_sofia] dont treat registers from websockets received over a proxy over non websockets as nat.  We should be sending to the route set and not locking on to send all requests to the websocket directly in this case

FS-11511: [mod_conference] allow conference vid-banner command to be run when you don't have video actively on the screen

FS-11516 [build-system] Add --enable-pool-sanitizer configure flag.  This will make it easier to find memory issues when using address sanitizer.  Also added -fstack-protector-strong when using --enable-address-sanitizer.

+ review all places where it used and reflect that 'fps' is (float)