* Add. Provision to Escene ES330/ES320
* Add. Look up Escene device by ext+domain.
* Update Escene template.
* Add. `provision` section in config.
Found than ES330 some time hangup when it try get software/core and get error from fusion.
added comments explaining each rule
normalized tabbing
converted captures where not needed (note use of ?: means don't capture)
updated Yealink comment as it also covers Polycom
added missing $mac-directory.xml for Polycom
removed ^(?:.*/) as it is technically not needed, the test that showed
it was needed turned out to be invalid