WAZO-2218: fix Yealink firmwares

Reviewed-by: Pascal Cadotte Michaud
             https://github.com/pc-m

WAZO-1406: add Cisco 88xx

Reviewed-by: https://github.com/apps/wazo-zuul

Why:
The W80 in DECT manager mode (DM) does not use a different product name
in both the User-Agent and in the $PN variable. Thus, the DECT manager
advertises itself as a W80B even though it is written W80DM all over the
web interface. This behaviour is different than the W90, which does the
wanted behaviour.

WAZO-2216: fix Gigaset firmware URLs

Reviewed-by: https://github.com/apps/wazo-zuul

Why: the phone interface asks for the password when the user has one set
to access the phone book and DND, forwards, etc.

Cisco ATA191: fix template proxy

Reviewed-by: https://github.com/apps/wazo-zuul

WAZO-2040: add Yealink W90 to v85 plugin

Reviewed-by: https://github.com/apps/wazo-zuul

Yealink v83 W80 -Fix firmware and download link

Reviewed-by: https://github.com/apps/wazo-zuul

Yealink v83 W60 - Fix firmware and download link

Reviewed-by: https://github.com/apps/wazo-zuul