userguide/eve: format and reorganize alert section

The `field action` portion seemed to be comprised of a more generic
section that followed it. Also formatted the section for lines to be
within the character limit.

doc/userguide/output/eve/eve-json-format.rst

@@ -89,23 +89,17 @@ generated the event.
 Event type: Alert
 -----------------
 
-Field action
-~~~~~~~~~~~~
-
-Possible values: "allowed" and "blocked"
-
-Example:
-
-::
-
-
-  "action":"allowed"
+This field contains data about a signature that matched, such as
+``signature_id`` (``sid`` in the rule) and the ``signature`` (``msg`` in the
+rule).
 
-Action is set to "allowed" unless a rule used the "drop" action and Suricata is in IPS mode, or when the rule used the "reject" action.
-
-It can also contain information about Source and Target of the attack in the alert.source and alert.target field if target keyword is used in
+It can also contain information about Source and Target of the attack in the
+``alert.source`` and ``alert.target`` field if target keyword is used in
 the signature.
 
+This event will also have the ``pcap_cnt`` field, when running in pcap mode, to
+indicate which packet triggered the signature.
+
 ::
 
   "alert": {
@@ -147,6 +141,49 @@ the signature.
     }
   },
 
+Action field
+~~~~~~~~~~~~
+
+Possible values: "allowed" and "blocked".
+
+Example:
+
+::
+
+  "action":"allowed"
+
+Action is set to "allowed" unless a rule used the "drop" action and Suricata is
+in IPS mode, or when the rule used the "reject" action. It is important to note
+that this does not necessarily indicate the final verdict for a given packet or
+flow, since one packet may match on several rules.
+
+.. _verdict-alert:
+
+Verdict
+~~~~~~~
+
+An object containning info on the final action that will be applied to a given
+packet, based on all the signatures triggered by it and other possible events
+(e.g., a flow drop). For that reason, it is possible for an alert with
+an action ``allowed`` to have a verdict ``drop``, in IPS mode, for instance, if
+that packet was dropped due to a different alert.
+
+* Action: ``alert``, ``pass``, ``drop`` (this latter only occurs in IPS mode)
+* Reject-target: ``to_server``, ``to_client``, ``both`` (only occurs for 'reject' rules)
+* Reject: an array of strings with possible reject types: ``tcp-reset``,
+  ``icmp-prohib`` (only occurs for 'reject' rules)
+
+Example:
+
+::
+
+    "verdict": {
+       "action": "drop",
+       "reject-target": "to_client",
+       "reject": "[icmp-prohib]"
+     }
+
+
 Pcap Field
 ~~~~~~~~~~
 
@@ -2532,4 +2569,4 @@ Example of DHCP log entry (extended logging enabled):
     "rebinding_time":43200,
     "client_id":"54:ee:75:51:e0:66",
     "dns_servers":["192.168.1.50","192.168.1.49"]
-  }
+  }