Add ikev2 to userguide

doc/userguide/partials/eve-log.yaml

@@ -156,6 +156,8 @@ outputs:
 
         # NFS logging. Requires Rust.
         - nfs
+        # IKEv2 logging. Requires Rust.
+        - ikev2
         - ssh
         - stats:
             totals: yes       # stats for all threads merged together

doc/userguide/rules/intro.rst

@@ -78,6 +78,7 @@ you can pick from. These are:
 * dnp3 (disabled by default)
 * enip (disabled by default)
 * nfs (depends on rust availability)
+* ikev2 (depends on rust availability)
 * ntp (depends on rust availability)
 
 The availability of these protocols depends on whether the protocol is enabled in the configuration file suricata.yaml.