bump version to 14.22
add upgrade note on ami-proxy in 14.21 upgrade notes
limit lines lengh (at most 100 characters long)
update doc on dial sheet event

only ringing agent receives a sheet.
"Agent Link" event is now simply "Link"
update CTI protocol about "faxsend" messages
remove dubious proxy configuration section
remove Unknown directive type "highlight".
add Community Documentation page
add xivopourlesnuls.wordpress.com in communtity documentation section
improve community documentation page
Merge remote-tracking branch 'origin/blocking-operation'
add Yealink to the list of phones that work behind NAT

Using recent firmware, all supported Yealink phones send their MAC
address in every HTTP request.
fix community doc author
fix grammar and styling
move community documentation up one level
reformulate de dial event description in call form config

the description did not cover the case when a user receives a call
Merge branch '5268-sheet-on-dial-event'
update documentation on queue diversion
Merge branch '5288-queue-diversion'