FreeBSD: VID-d0be41fe-2a20-4633-b057-4e8b25c41780: bro -- array bounds and potential DOS issues

Corelight reports: Bro 2.5.5 primarily addresses security issues: Fix array bounds checking in BinPAC: for arrays that are fields within a record, the bounds check was based on a pointer to the start of the record rather than the start of the array field, potentially resulting in a buffer over-read. Fix SMTP command string comparisons: the number of bytes compared was based on the user-supplied string length and can lead to incorrect matches. e.g. giving a command of "X" incorrectly matched "X-ANONYMOUSTLS" (and an empty commands match anything). Address potential vectors for Denial of Service: "Weird" events are now generally suppressed/sampled by default according to some tunable parameters. Improved handling of empty lines in several text protocol analyzers that can cause performance issues when seen in long sequences. Add `smtp_excessive_pending_cmds' weird which serves as a notification for when the "pending command" queue has reached an upper limit and been cleared to prevent one from attempting to slowly exhaust memory.