The virtual interface match patterns of various protocols were improperly
quoted, causing them to over- or undermatch.
Follow up of #1435.
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
Derived mostly from (ppp) 3g implementation. Currently exposing the following configuration through cbi (apn/pincode/username/password/auth/ipv6).
Signed-off-by: David Thornley <david.thornley@touchstargroup.com>