Support all protocols in the services

[victor]

Currently there is a small number of protocols supported and the support is hardcoded. We have TCP, UDP, ICMP, AH, ESP, Protocol 41 and GRE. There is no way in Vuurmuur to add others, like IGMP for example.

Right now the backend stores a protocol like this: TCP="80:81*1024:65535" UDP="" ICMP=""

We can change this to something like: PROTO="6,80:81*1024:65535" PROTO="17,53*1024:65535" PROTO="2"

Of course the changes should be backwards compatible.