security/vuxml: Mark zeek < 6.0.1 as vulnerable as per:

https://github.com/zeek/zeek/releases/tag/v6.0.1

This release fixes the following potential DoS vulnerabilities:

• File extraction limits were not correctly enforced for files containing large amounts of missing bytes.
• Sessions are sometimes not cleaned up completely within Zeek during shutdown, potentially causing a crash when using the -B dpd flag for debug logging.
• A specially-crafted HTTP packet can cause Zeek's filename extraction code to take a long time to process the data.
• A specially-crafted series of FTP packets made up of a CWD request followed by a large amount of ERPT requests may cause Zeek to spend a long time logging the commands.
• A specially-crafted VLAN packet can cause Zeek to overflow memory and potentially crash.

Reported by: Tim Wojtulewicz