security/zeek: Update to 5.0.1

https://github.com/zeek/zeek/releases/tag/v5.0.1

Security fixes since 5.0.0:

• Fix a possible overflow and crash in the ARP analyzer when receiving a specially crafted packet.
• Fix a possible overflow and crash in the Modbus analyzer when receiving a specially crafted packet.
• Fix two possible crashes when converting IP headers for output via the raw_packet event.
• Fix an abort related to an error related to the ordering of record fields when processing DNS EDNS headers via events

Other changes:

• Fix a number of typos in the weak-keys.zeek script in the SSL framework.
• Fix build of internal Spicy when using the --disable-cpp-tests configure flag.
• Avoid calling safe_realloc unnecessarily from ODesc::Grow(), providing a peformance improvement in some cases.
• Remove use of fallible get_conn_transport_proto() in analyzer_violation event handlers.
• Remove a warning when receiving packets with invalid or unknown IP protocol types, preventing it from spamming reporter.log.
• Fix workers failing to peer with proxies if they take too long to start.
• Fix Zeek build failures when building against an external version of Spicy.
• Update Spicy to version 1.5.1 and spicy-plugin to 1.3.17.

Reported by: Tim Wojtulewicz