update xivo-confd HTTP ports

Port 50050 and 50051 are being deprecated, although it will still be
possible to connect to xivo-confd via these ports.
bump version to 14.20
Merge pull request #14 from xivo-pbx/confd-http-conf

update xivo-confd HTTP ports
add network infos for xivo daemons
add support for Cisco SPA122 ATA
parameters for using fax on analog gateways have changed.
add 14.20 upgrade notes
Merge branch '5221-spa122'
Add warning about the 'ring all' queue strategy and statistics.
split hardware page into multiple page

This is an example.
link section example
Cards : new toctree
Cards : page rewritten. This page explain how to create the
dahdi/modules file and how to select the line mode between E1 and T1.
Typo
Add ref
Cards EC : page rewritten with new organization
Harmonize structure with echo_canceller page
Fix a typo
Corrections following a re-reading of the pages
Typo in next step