Add missing payload type to events API

The Security Events Framework API was changed while adding the generation of
security events in chan_sip.  A payload type and name was missed from being
added to struct ie_maps.

(closes issue ASTERISK-19759)
Reported by: Michael L. Young
Patches:
    issue-asterisk-19759.diff uploaded by Michael L. Young (license 5026)
........

Merged revisions 362918 from http://svn.asterisk.org/svn/asterisk/branches/10


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@362919 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/event.c

@@ -267,6 +267,7 @@ static const struct ie_map {
 	[AST_EVENT_IE_RECEIVED_CHALLENGE]  = { AST_EVENT_IE_PLTYPE_STR,  "ReceivedChallenge" },
 	[AST_EVENT_IE_RECEIVED_HASH]       = { AST_EVENT_IE_PLTYPE_STR,  "ReceivedHash" },
 	[AST_EVENT_IE_USING_PASSWORD]      = { AST_EVENT_IE_PLTYPE_UINT, "UsingPassword" },
+	[AST_EVENT_IE_ATTEMPTED_TRANSPORT] = { AST_EVENT_IE_PLTYPE_STR,  "AttemptedTransport" },
 
 };