add memorykey and linekey's definition of U series

Reviewed-by: Alexandre Fournier <None>

WAZO-2550: Aastra/Mitel DHCP update

Reviewed-by: Pascal Cadotte Michaud <None>

WAZO-2545: Patton upgrade

Reviewed-by: Pascal Cadotte Michaud <None>

[WAZO-2607] yealink-v85: add missing W73H handset

Reviewed-by: Pascal Cadotte Michaud <None>

WAZO-2533: Yealink W80 firmware update

Reviewed-by: Pascal Cadotte Michaud <None>

WAZO-2328: Yealink T58W

Reviewed-by: Pascal Cadotte Michaud <None>

WAZO-2327: yealink-w70

Reviewed-by: Pascal Cadotte Michaud <None>

Digium: add intercom

Reviewed-by: Pascal Cadotte Michaud <None>

This and another patch in wazo plugin allow a digium d70 to work as intercom

fix error template funckeys Aastra 6865i

Reviewed-by: Pascal Cadotte Michaud <None>
Reviewed-by: Alexandre Fournier <None>

add short_label in fkeys

Reviewed-by: Alexandre Fournier <None>

disable ring splash function

Reviewed-by: https://github.com/apps/wazo-production-sf

gigaset N870: handle Handset= in User-Agent

Reviewed-by: https://github.com/apps/wazo-production-sf

WAZO-2371: define codecs

Reviewed-by: https://github.com/apps/wazo-production-sf