Consistently use uintXX_t from <stdint.h> instead of u_intXX_t.

Fix build after recent IKEv2 message fragment retransmit change.
Found by anton@

Avoid including sys/param.h. Make a local copy of MINIMUM() in test_helper.h
instead, like we did elsewhere.

ok bluhm@

'struct group' is now called 'struct dh_group'.

Fix config_add_transform and config_free_proposal.

Fix ikev2_nat_detection().

Constify sa in ikev2_pld_eap(). The parser code must not change any
sa or policy state, this should help make it clearer.

ok patrick@

Fix changed eap_parse signature.

Properly handle multiple CERTREQ payloads in CA process. Only for the
last CERTREQ a mismatch should trigger the fallback case, otherwise the
following CERTREQs are ignored.

ok markus@

Fix undefined symbol for ikev2_ike_sa_setreason.

Add ikev2_ikesa_info dummy definition for parser test.

Add support for IKEv2 Message Fragmentation as defined in RFC 7383.

ok sthen@

fuzz the iked payload parser using the openssh unit-test framework
from hshoexer