iked: introduce and use print_addr()

The vast majority of print_host() callers cast the first argument
(usually a sockaddr_storage *) to (struct sockaddr *) and pass both
a NULL buffer and 0 length.

iked: introduce and use print_addr()

The vast majority of print_host() callers cast the first argument
(usually a sockaddr_storage *) to (struct sockaddr *) and pass both
a NULL buffer and 0 length. Cast and useless arguments lead to
awkward line wrapping in many places. Clean this up by introducing a
helper. Make this helper take a void pointer, so all casts go away.

ok claudio kn tobhe

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Make proto config option accept a list to allow specifying multiple
protocols for a single policy, e.g. "proto { ipencap, ipv6 }".

feedback and ok benno@
ok patrick@

The tag comes after iface in iked.conf(5).

Move policy printing code from parse.y to new print.c

ok patrick@