rp_pppoe: Copy acName and pppd_pppoe_service after option parsing

rp_pppoe: Copy acName and pppd_pppoe_service after option parsing

At present, the access concentrator name (acName) and service name
(pppd_pppoe_service) are set by option parsing, but are used at the
point of PPPOEInitDevice(), which gets called when the ethernet
device name is seen.  So if the rp_pppoe_service or rp_pppoe_ac
options appear after the device name, they are ignored.

This fixes it by using acName and pppd_pppoe_service in
PPPOEConnectDevice, which gets called after all options have been
parsed.

Signed-off-by: Paul Mackerras <paulus@samba.org>