Refactor operations to access the stasis cache instead of objects directly when retrieving information.

(closes issue ASTERISK-21883)

Review: https://reviewboard.asterisk.org/r/2645/


git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@393831 f38db490-d61c-443f-a65b-d21fe96a405b
Ensure that a valid bind host is specified for transports.

(closes issue ASTERISK-22017)
Reported by: Rusty Newton


git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@393833 f38db490-d61c-443f-a65b-d21fe96a405b
Better structure for the WebSocket validation failure message

git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@393834 f38db490-d61c-443f-a65b-d21fe96a405b