unify ovpn_handle_peer_multi() and ovpn_handle_peer() #800
Description
As explained in gerrit#1100 I think these functions are mostly redundant, as ovpn_handle_peer() already handles both the P2P and (one) P2MP peer case - and since there is no loop (but netlink will just call the function multiple times) it very much like it should handle all the cases just fine - rip out duplicate code, a confusing if() statement, and so on...
Feel free to close the issue if you do not agree ;-)